Have been vs. were
"The Libyan authorities have recently reiterated that existing contracts would be honoured provided that such contracts have been properly entered into." (Doing business in Libya after the 2011 revolution)
I would've written "were entered into" instead of "have been entered into" since past completed events are in question. How about you?
Re: Have been vs. were
It's probably a typo, but you seem to have left out the word "properly".
I too would say "were properly entered into."
But remember, this comes from a blog and you can't expect bloggers to be held to the same standard of usage as writers for the NY Times.