For schools wanting students to only be able to register for exams linked to AP courses that begin AFTER the College Board's initial order deadline (that is, spring-only or second-semester courses), you can configure your AP registration to no longer show exams/periods linked to full-year and fall-only (or first-semester) courses by selecting "yes" to the question on the General Info page of the AP configuration. Once you select "yes" to the question "After a particular date, will students only be able to register for exams/periods that begin after College Board's initial order deadline?", then you can choose the date when the exams/periods linked to full-year and fall-only (or first-semester) courses no longer show on the registration form.