blackshoe, on 2019-June-29, 16:36, said:
Pran: The statement is true. I don't understand your objection to it.
Law 9A said:
1. Unless prohibited by Law, any player may draw attention to an irregularity during the auction period, whether or not it is his turn to call.
2. Unless prohibited by Law, declarer or either defender may draw attention to an irregularity that occurs during the play period. For an incorrectly pointed card see Law 65B3.
2. Unless prohibited by Law, declarer or either defender may draw attention to an irregularity that occurs during the play period. For an incorrectly pointed card see Law 65B3.
Nothing in this (general) law says anything about "leading or playing to the following trick".
This limitation applies only to incorrectly pointed cards as explicitly specified in Law 65B3.
And observe that the clause "Unless prohibited by Law" excludes for instance Dummy in many situations from the rights otherwise given in Law 9.
So sorry - the statement I marked is very unfortunate and in many situations directly wrong.