Minimum bet question

[Cobra]

Our group plays No Limit Texas Hold-em. I want to make sure we are betting properly. Assume the blinds are 10/20.

Pre Flop:

Player one can fold, call 20 or raise to 40 or more.
Assume player one raise to 50

Player two can fold, call 50 or raise to 80 or more.

For all hands after the flop

Player one can check or bet 20 or more.
Assume player one bets 50.

Player two can fold, call 50 or raise to 100 or more.

Do I have this right.

Cobra