Here are the rules for your perusal:

THE CODE, (Every Captain and player should carefully read this at least once. These are the rules we play under when no official is present, which is essentially 100% of the time.)

USTA Official Rules of Tennis (from "Friend at Court, 2008"

2008 Sectional Rules and Regulations ("Captains Handbook")

2008 USTA LEAGUE RULEBOOK ("National League Tennis Rules")

Regulations page on SCTA site. Some of the above links also appear here.

San Fernando Valley Local League Rules for 2008 Fall Doubles.