I'm not sure that a legal definition of marriage is the issue. UPS is not legally required to let anyone transfer, married or not. Allowing some management employees to transfer because of their domestic situation while denying that option to others, with the deciding factor being the gender of the employee's domestic partner, is clearly discriminatory (ok, bigotry was a bit strong) regardless of whether or not you agree with the policy or what your position is on the gay marriage debate. At any rate, according to UPS, they were already planning to correct this policy in order to make it more inclusive. I applaud the company's action, it makes me proud to be a UPSer.