American Football Rules IFAF Approved Ruling 6-5-5:III

III. B1 catches the punt after B3 signals for a fair catch. RULING: The ball is dead when and where caught. B1 is not entitled to catch protection but is entitled to the same protection he has
after any other dead ball (Rule 6-5-1-d). [Cited by 6-5-1-d, 6-5-5]