Which Clubs a Casual Golfer Can Genuinely Skip
Fourteen is a ceiling, not a target. The gapping test that shows which clubs in your bag are doing nothing, and why fewer usually scores better.
14 club rule
The 14-Club Rule in Golf: What Counts and the Penalty
The limit, what to do if you miscount, and the exact penalty by format. Rule 4.1b(1) from the 2023 Rules of Golf, cited.