- 2/6/26: S26 information published
- 2/10/26: restriction info updated for INF 143
- 2/10/26: restriction info updated for GDIM 41/ ICS 60
- 2/10/26: restriction info updated for CS 121/ INF 141
- 2/18/26: restriction info updated for ICS 6N
Enrollment Windows and Restrictions for ICS Courses
Spring 2026
Please check this page periodically as course restriction dates are subject to change.
The University Registrar opens enrollment windows for UC Irvine students, which are set according to seniority levels.
ICS places additional restrictions on windows for specific courses to prioritize students based primarily on their major, and sometimes also on seniority:
ICS enrollment restrictions Google spreadsheet.
- The online listing will be updated by February 20th, 2026. Until then, refer to the General Catalogue for the most accurate and up-to-date prerequisite information.
- UCI Prerequisites
- Important: If you satisfied any part of a course’s prerequisite(s) at another institution and you have not yet been cleared to enroll in that course, be sure to submit an Online Course Prerequisite Clearing request.
The School of ICS majors will have priority for seating in most School of ICS courses until 12:00pm, March 19th, 2026. See the detailed timeline for specific information.
- If a course is a core requirement for an ICS degree, first consideration is given to students in that major.
- If a course is a Specialization or Track requirement for an ICS degree, second consideration is given to students pursuing that Specialization or Track.
- If a course is a core requirement for a degree outside of ICS, a third consideration will be given to students in that major following the schedule outlined on this page.
- Majors outside the School of ICS may begin enrolling in ICS courses on 3/19/26 at 12:00pm.
- Quantitative Economics Juniors and Seniors will be able to enroll in STATS 120C from 3/3/26, at 9:00am until 3/6/26, at 12:00pm.
- Computer Engineering majors will be able to enroll in ICS 6D starting 3/13/26, at 12:00pm
- CSE majors under the School of Engineering: if you meet the prerequisites but are unable to register in an upper-division CS course (100-190), contact ICS Student Affairs for assistance. (Note: INF courses (101-174) will be available to CSE majors beginning 3/6/26.
- Any non-ICS student found to be enrolled in ICS courses without permission from ICS Student Affairs before noon on 3/16/26 will be dropped.
- CS 132/ EECS 148
- CS 142A
- CS 154
- CS 180B
- ICS 6B
- ICS 31
- ICS 32
- ICS 33
- ICS 46
- ICS 51
- ICS 53
- ICS 139W (online section)
- INF 117
- INF 191B
- Repeat restriction is in place for all School of ICS courses.
- If you plan to repeat a course, you can start enrolling in that course on 3/11/26.
On February 23th, 2026:
All IN4MATX courses are restricted to INF & SE majors only, except:
The following is open to School of ICS & CSE majors only:
- INF 43
The following is open to INF, SE, & BIM majors only:
- INF 141/ CS 121
The following is open to INF, SE, & DS majors only:
- 143
The following are open to INF & SE Seniors only:
- INF 191B
On February 27th, 2026, at 12:00pm:
All IN4MATX courses will be restricted to INF, SE, BIM, & GDIM majors only
The following will remain open to School of ICS & CSE majors only:
- INF 43
The following will be open to INF, SE, BIM, & DS majors only:
- 143
The following will remain restricted to INF & SE Seniors only:
- INF 191B
On March 9th, 2026, at 12:00pm:
All IN4MATX courses will be open to School of ICS & CSE majors only:
The following will remain restricted to INF & SE Seniors only:
- INF 191B
ICS Undergraduate Students who wish to enroll in an ICS graduate-level course:
- Send your request and a copy of your written permission from the instructor to ucounsel@uci.edu
- ICS Undergraduate Student Affairs will begin processing requests on March 9, 2026.
- Approvals are contingent on seating availability.
- Note that graduate-level courses taken as an undergraduate will not count towards a graduate degree program.
The Fee Payment deadline for Spring 2026 is Monday, March 16th, 2026 at 5:00pm.
- Any non-ICS student found to be enrolled in ICS courses without permission from ICS Student Affairs before noon will be dropped.
On March 19th, 2026, at 12:00pm:
All school/major restrictions are lifted from courses except:
- ICS 139W (will remain restricted to the School of ICS)
- INF 191B (will remain restricted to INF and SE Seniors only)
The School of ICS reserves the right to extend or reinstate major restrictions on courses beyond this date.
Restriction Timeline by Course
| 2/23/2026 |
|
| COMPSCI courses are open to all School of ICS and CSE majors only, except:
The following are open to CS, INF, SE, and BIM majors only:
The following are open to INF, SE, and BIM majors only:
The following are open to School of ICS and School of Engineering majors only:
The following are open to CS and CSE Seniors only:
The following are open to CS majors only:
The following will be open only to students who enrolled in CS 180A in W26:
|
|
| 2/24/2026 |
|
| 9:00am: Upper-Division Standing only:
The following courses will remain Senior Standing only:
No changes made to the school/major restrictions set on 2/23/26 |
|
| 2/26/2026 | |
| 9:00am: CS 145 will be restricted to Upper-Division CS and CSE majors only:
|
|
| 2/27/2026 | |
| 9:00am:
The following will remain open to CS, INF, SE, and BIM majors only:
|
|
| 3/2/2026 | |
| 9:00am:
Upper-Division Standing removed from most Upper-Division CS courses. The following will remain restricted to Upper-Division Standing only:
The following will be open to GDIM, INF, SE, and BIM majors only:
|
|
| 3/9/2026 | |
| 12:00pm: The following courses will be open to School of ICS and CSE majors only:
|
|
| 3/11/2026 | |
| 12:00pm: Repeat restriction removed from all School of ICS courses. |
|
| 3/16/2026 | |
| 5:00pm: Fee payment deadline for the Spring 2026 quarter
Missing the fee payment deadline will result in your being dropped from Spring courses. |
|
| 3/19/2026 | |
| 12:00pm:
WebReg reopens for continuing registration. School/Major restrictions are removed from most School of ICS courses:
|
|
| 3/27/2026 | |
| Campus closed in observance of Cesar Chavez Day. | |
| 3/30/2026 | |
| First day of Spring 2026 instruction. Students on the waitlist for any ICS course should be in contact with the instructor prior to the start of instruction. With instructor permission, make arrangements to ensure you can access course materials and submit any assignments in a timely manner while you are still on the waitlist. |
|
| 3/30/2026 – 4/3/2026 | |
| Prerequisite sweeps will be conducted on all School of ICS classes. Any student who does not have the required course prerequisite(s) for a course WILL BE DROPPED from that course. | |
| 4/3/2026 | |
5:00pm: Early Add, Drop, Change Grade Option deadline for the following:
Contact the instructor of the course to request permission to add or drop. |
|
| 4/10/2026 | |
| Add, Drop, Change Grade Option deadline, 5:00 pm
Last day to add, drop, or change grade option in WebReg for any ICS course. |
|
| 2/23/2026 |
|
GDIM courses will be restricted to GDIM majors only:
The following will be open to ALL campus majors:
|
|
| 2/24/2026 |
|
| 9:00am: All Upper-Division GDIM courses are restricted to Upper-Division Standing only. No changes made to the school/major restrictions set on 2/23/26 |
|
| 3/2/2026 |
|
| 9:00am:
Upper-Division Standing restriction removed from Upper-Division GDIM courses. The following will remain restricted to Upper-Division standing only:
|
|
| 3/9/2026 |
|
| 12:00pm:
The following courses will be opened to the School of ICS only:
GDIM 41/ ICS 60 will remain open to the School of ICS only. |
|
| 3/11/2026 | |
| 12:00pm:
Repeat restriction removed from all School of ICS courses. |
|
| 3/16/2026 |
|
| 5:00pm: Fee payment deadline for the Spring 2026 quarter
Missing the fee payment deadline will result in your being dropped from Spring courses. |
|
| 3/19/2026 |
|
| 12:00pm:
WebReg reopens for continuing registration. School/Major restrictions are removed from most School of ICS courses:
|
|
| 3/27/2026 |
|
| Campus is closed in observance of Cesar Chavez Day. | |
| 3/30/2026 |
|
| First day of Spring 2026 instruction. Students on the waitlist for any ICS course should be in contact with the instructor prior to the start of instruction. With instructor permission, make arrangements to ensure you can access course materials and submit any assignments in a timely manner while you are still on the waitlist. |
|
| 3/30/2026 – 4/3/2026 |
|
| Prerequisite sweeps will be conducted on all School of ICS classes. Any student who does not have the required course prerequisite(s) for a course WILL BE DROPPED from that course. | |
| 4/10/2026 |
|
| Add, Drop, Change Grade Option deadline, 5:00 pm
Last day to add, drop, or change grade option in WebReg for any ICS course. |
|
| 2/23/2026 |
|
| I&C SCI restrictions vary by course:
The following will be open to ALL campus majors:
The following courses are open to the School of ICS and CSE majors only:
The following course is open to CS and CSE majors only:
The following course is open to the School of ICS majors only:
The following course is open to CS, GDIM, DS, and SE majors only :
|
|
| 2/24/2026 |
|
| 9:00am: All Upper-Division ICS courses are restricted to Upper-Division Standing only.No changes made to the school/major restrictions set on 2/23/26 |
|
| 3/2/2026 |
|
| 9:00am:
Upper-Division Standing restriction removed from Upper-Division ICS courses, except: The following will remain restricted to Upper-Division Standing only:
|
|
| 3/6/2026 |
|
| 12:00pm:
The following courses will be opened to the School of ICS only:
|
|
| 3/11/2026 | |
| 12:00pm:
Repeat restriction removed from all School of ICS courses. |
|
| 3/13/2026 | |
| 12:00pm:
The following course is open to the School of ICS, CSE, and CpE majors only:
|
|
| 3/16/2026 |
|
| 5:00pm:
Fee payment deadline for the Spring 2026 quarter Missing the fee payment deadline will result in your being dropped from Spring courses. |
|
| 3/19/2026 |
|
| 12:00pm:
WebReg reopens for continuing registration. School/Major restrictions are removed from most School of ICS courses:
|
|
| 3/27/2026 |
|
| Campus is closed in observance of Cesar Chavez Day. | |
| 3/30/2026 |
|
| First day of Spring 2025 instruction. Students on the waitlist for any ICS course should be in contact with the instructor prior to the start of instruction. With instructor permission, make arrangements to ensure you can access course materials and submit any assignments in a timely manner while you are still on the waitlist. |
|
| 3/30/2026 – 4/3/2026 |
|
| Prerequisite sweeps will be conducted on all School of ICS classes. Any student who does not have the required course prerequisite(s) for a course WILL BE DROPPED from that course. | |
| 4/3/2026 |
|
| 5:00pm
Early Add, Drop, Change Grade Option deadline for the following:
Contact the instructor of the course to request permission to add or drop. |
|
| 4/10/2026 |
|
| Add, Drop, Change Grade Option deadline, 5:00pm
Last day to add, drop, or change grade option in WebReg for any ICS course. |
|
| 2/23/2026 |
|
| All In4matx courses are restricted to INF & SE majors only, except:
The following is open to School of ICS and CSE majors only:
The following is open to INF, SE, & BIM majors only:
The following is open to CS, INF, SE, and BIM majors only:
The following course is open to INF, SE, BIM, and DS majors only:
The following course is open to INF majors only:
The following are open to INF and SE Seniors only:
|
|
| 2/24/2026 |
|
| 9:00am: All Upper-Division INF courses are restricted to Upper-Division Standing only. The following will remain Senior Standing only:
No changes made to the school/major restrictions set on 2/23/26 |
|
| 2/27/2026 |
|
| 9:00am:
All IN4MATX courses will be restricted to INF, SE, BIM, & GDIM majors only, except: The following will remain open to School of ICS and CSE majors only:
The following will remain open to CS, INF, SE, and BIM majors only:
The following will remain open to INF, SE, BIM, and DS majors only:
The following will remain restricted to INF and SE Seniors only:
|
|
| 3/2/2026 |
|
| 9:00am:
Upper-Division Standing removed from most Upper-Division INF courses, except: The following will remain Upper-Division Standing only:
The following course is now open to INF, SE, BIM, and GDIM majors only:
The following course will remain Senior Standing only:
|
|
| 3/9/2026 |
|
| 12:00pm:
The following courses will be open to School of ICS and CSE majors only:
The following course will be restricted to the School of ICS, Upper-division standing only:
The following courses’ restrictions remain unchanged as set on 2/23/26:
|
|
| 3/11/2026 |
|
| 12:00pm:
Repeat restriction removed from all School of ICS courses. |
|
| 3/16/2026 |
|
| 5:00pm: Fee payment deadline for the Spring 2026 quarter
Missing the fee payment deadline will result in your being dropped from Spring courses. |
|
| 3/19/2026 |
|
| 12:00pm: WebReg reopens for continuing registration.School/Major restrictions are removed from most School of ICS courses.
|
|
| 3/27/2026 |
|
| Campus is closed in observance of Cesar Chavez Day. | |
| 3/30/2026 |
|
| First day of Spring 2026 instruction. Students on the waitlist for any ICS course should be in contact with the instructor prior to the start of instruction. With instructor permission, make arrangements to ensure you can access course materials and submit any assignments in a timely manner while you are still on the waitlist. |
|
| 3/30/2026 – 4/3/2026 |
|
|
Prerequisite sweeps will be conducted on all School of ICS classes. Any student who does not have the required course prerequisite(s) for a course WILL BE DROPPED from that course. |
|
| 4/3/2026 |
|
5:00pm: Early Add, Drop, Change Grade Option deadline for the following:
Contact the instructor of the course to request permission to add or drop. |
|
| 4/10/2026 |
|
| Add, Drop, Change Grade Option deadline, 5:00 pm
Last day to add, drop, or change grade option in WebReg for any ICS course. |
|
| 2/23/2026 |
|
| STATS restrictions vary by course:
The following are open to GDIM majors only:
The following courses are open to all campus majors:
The following are open to School of ICS and CSE majors only:
The following are open to DS majors only:
The following course is open to DS Seniors only:
|
|
| 2/24/2026 |
|
| 9:00am: All Upper-Division STATS courses are restricted to Upper-Division Standing only. The following course will remain Senior Standing only:
No changes made to the school/major restrictions set on 2/23/26 |
|
| 3/2/2026 |
|
| 9:00am: Upper-Division Standing removed from most courses, Upper-Division STATS courses.The following course will remain Senior Standing only:
|
|
| 3/3/2026 |
|
| 9:00am: The following course will be open to DS and Q. Econ Juniors and Seniors only:
|
|
| 3/6/2026 |
|
| 12:00pm: The following courses will be open to the School of ICS only:
The following will remain restricted to DS Seniors only:
|
|
| 3/11/2026 |
|
| 12:00pm:
Repeat restriction removed from all School of ICS courses. |
|
| 3/16/2026 |
|
| 5:00pm: Fee payment deadline for the Spring 2026 quarter
Missing the fee payment deadline will result in your being dropped from Spring courses. |
|
| 3/19/2026 |
|
| 12:00pm:
WebReg reopens for continuing registration. School/Major restrictions are removed from most School of ICS courses:
|
|
| 3/27/2026 |
|
| Campus is closed in observance of Cesar Chavez Day. | |
| 3/30/2026 |
|
| First day of Spring 2026 instruction. Students on the waitlist for any ICS course should be in contact with the instructor prior to the start of instruction. With instructor permission, make arrangements to ensure you can access course materials and submit any assignments in a timely manner while you are still on the waitlist. |
|
| 3/30/2026 – 4/3/2026 |
|
| Prerequisite sweeps will be conducted on all School of ICS classes. Any student who does not have the required course prerequisite(s) for a course WILL BE DROPPED from that course. | |
| 4/10/2026 |
|
| Add, Drop, Change Grade Option deadline, 5:00 pm
Last day to add, drop, or change grade option in WebReg for any ICS course. |
|