On the 29th of February, 2012, President Obama used a waiver to extract the nation out of the nastier part of last December‘s controversial National Defense Authorization Act (NDAA) bill: the enshrining of Bush era policy of indefinite military detention for terrorism suspects in law.

OK. This was not legally a „veto“ – presidents do not have the line item veto that this would have taken. It was a policy directive as required under Section 1022.