After he signed the omnibus into law Friday, the White House released a concurrent signing statement saying Obama will object to portions of the legislation on constitutional grounds.

Signing statements are highly controversial, and their legality is disputed.

“I have advised the Congress that I will not construe these provisions as preventing me from fulfilling my constitutional responsibility to recommend to the Congress’s consideration such measures as I shall judge necessary and expedient,” Obama said in a statement as he signed the bill into law.

The signing statement says that on the issue of accused terrorist detainees, Obama will interpret and apply provisions that bar the transfer of detainees from Guantanamo Bay, Cuba, “in a manner that avoids constitutional conflicts.”