# 2025-2026 General Catalog
**Source**: https://catalog.ucdavis.edu/academic-information-policies-regulations/registration-course-load/late-actions/
**Parent**: https://catalog.ucdavis.edu/
Adding and dropping courses is governed by [Davis Division Regulation 547](https://academicsenate.ucdavis.edu/bylaws-regulations/regulations#547-)¹.
The information provided below applies to published [Quarter Dates & Deadlines](https://registrar.ucdavis.edu/calendar/web/quarter).
Deadlines for registration actions differ during Summer Sessions. For deadlines and refund dates, see the [Summer Sessions Academic Calendar](https://summer-sessions.ucdavis.edu/calendar/master-calendar).
## Section Switch After the Add/Drop Deadline
## Late Add of a Course with a Permission to Add (PTA)
## Late Course Drop Information
## Late Enrollment After the 10th Day of Instruction
## Variable Unit Course Change After the 25th Day of Instruction
## Late S/U Grading Options After the 25th Day of Instruction
## Late Pass/Not Passed Option After the 40th Day of Instruction
## Late Actions for Professional Program Students
## Retroactive Actions After the End of the Quarter
## ¹ Davis Division Regulation 547
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