That was changed in the last 15 years. Your first statement was true a while ago.Here, I'll correct myself. From the ODWC website:
A lifetime license holder, whether it be combination, hunting, or fishing, will not lose the benefits of the license by a change of address, even if he or she ceases to be an Oklahoma resident by moving out of the state. If you move, you should report your new address to our office.
link: http://www.wildlifedepartment.com/license/lifelist.htm
I stand corrected...by myself!