Messages are available and sorted by year in the menu to the left. Not sure of the message number? You can perform a directed search using Google:
Go to Google.com
Enter your search term and follow it with "site:www.public.navy.mil/bupers-npc/ (example: retirement site:www.public.navy.mil/bupers-npc/) This limits search to a specified site.
Permissive Temporary Duty messages have been replaced by MILPERSMAN 1320-220. However, NAVADMINs 078/95, 109/92, and 123/93 are available for download.