It should be noted there is no such thing as a "draw by perpetual check" under the rules, either the FIDE Laws of Chess or any federation's national tournament rules.
A draw may be forced by stalemate, threefold repetition of position, the 50-move rule, or by agreement where permitted. There is no other way.
"Perpetual check" is a real tactic, of course, and will by force lead to one of the other draws, usually threefold repetition. Many players will recognize this and just agree to the draw once a perpetual has been demonstrated. But it is no different from the tactic of "perpetual attack" against another piece, such as the Queen, under the rules.
Agreed
So that I'm clear -- this perpetual check that you speak of: I can cash it over and over again?