Amending Section 2 of an Ordinance (Bill No. 080760) approved December 22, 2008, entitled "An Ordinance authorizing and directing the revision of lines and grades on a portion of City Plan No. 307 by relocating the westerly curb line and house line of Fifteenth Street between Arch Street and Cherry Street, under certain terms and conditions," by revising the terms and conditions stated therein and extending the period for compliance therewith. — Open Common Ground