What is Section 143 in land purchases in Uttar Pradesh?

What is Section 143 in land purchases in Uttar Pradesh? map approval rules in uttar pradesh 5 Building Map approval from concerned Development AuthorityDesignated Authority of area 6 mapai 1973 Uttar Pradesh Urban Plannign and Development Act GOVERNMENT GAZETTES 2016 Rebate in Map Approval Charges for Public Institutions · 2016 PMAY

mapai EXISTING APPROVED BUILDING: Nothing in these Bye-Laws shall require the k) In case the site falls in the built-up area declared as slum under any Act no

map plan Directions for Planned and Streamlined development of Development Area under Uttar Pradesh Urban Planning & Development Act, 1973 Map Approval System for  UPSIDA Map Approval