2 card rule in Omaha

[omahajoe57]

Just a quick question regarding the rules of Omaha hi/lo. I have a friend who played at a cardroom in Iowa and said the house rules forced you to use 2 different cards for the high and low pots. Example, you have A2KK in the hole. If you use A2 for the low you have to use KK for the high. I'm curious if this is the norm or simply an abberation. If I were to play Omaha hi/lo in Atlantic City or Vegas would I run into the same rule?