Amending Section 2 of an Ordinance (Bill No. 190450) approved July 17, 2019, entitled ?An Ordinance authorizing the revision of lines and grades on a portion of City Plan No. 15-S by placing on the City Plan Alter Street from Seventeenth Street to Eighteenth Street in order to conform more closely with existing conditions, under certain terms and conditions,? by revising the terms and conditions stated therein and making certain technical changes, all under certain terms and conditions.