I always play the same tees at the same course. Is my Handicap Index® "established" from that set?

A Handicap Index® is not tied to a specific set of tees. Each posted score is converted to a Score Differential™, which measures your performance against a course of standard difficulty.

Because of this, your Handicap Index® is portable and is converted into a Course Handicap™ each time you play. For more details, see Rule 5 of the Rules of Handicapping.