The Students with Disabilities - Accommodations and Accessibility and Student Health and Well-Being sections are the only sections on the Syllabus page that can't be edited or deleted. The text in the Academic Ethics and Student Conduct Code can't be deleted as well, but additional information can be added that will appear directly below the uneditable text.
Additional sections of the syllabus may be uneditable if it's after the start date of the term in which the course is offered.