Good question.
If there is no provision in the law for the issuing of waivers, then selective enforcement would seem to be unconsitutional.
If there is a provision in the law for the issuing of waivers, then the provision should have to specify the reasons a waiver might be granted and those reasons would have to be applied in a fair manner.
I agree, as it stands the “waivers” sound like a way for the Obama administration to reward its allies. You put the government in charge of something, and favoritism runs rampant.