Final answer:
Personnel assigned as resident advisors for unaccompanied housing must complete resident advisor training within 45 days according to the SAPR program.
Step-by-step explanation:
The timeline for personnel assigned as resident advisors for unaccompanied housing to attend resident advisor training as per the Sexual Assault Prevention and Response (SAPR) program is 45 days. This information aligns with the reported average time found in Willcocks' documentation from 1913. Though other durations have been mentioned in various sources like Barois in 2010, the specific requirement according to the question is to complete the training within 45 days of assignment.