Resolution amending Resolution No. 456 of 2015, authorizing an amendment or amendments(s) to the existing Rooftop License Agreement between the City of Pittsburgh and 600 GS Prop LP, a Pennsylvania limited partnership, in order to extend the term through May 5, 20182023, at a cost not to exceed eighty-four thousand one hundred forty-seven dollar and eighty-nine cents ($84,147.89)Two Hundred Twenty-Eight Thousand Five Hundred Fifty-Nine Dollars and Forty-Nine Cents ($228,559.49)