Section 25 authorises the Vice‑Chairman of the Development Authority to empower any person, with or without assistants or workmen, to enter into or upon any land or building for specified purposes connected with the administration of the Act. These purposes include conducting surveys and measurements, examining works under construction, determining the course of sewers and drains, digging or boring into the sub‑soil, and setting out boundaries and lines of proposed work.[4]

A key function of this provision is to allow officers to verify whether development is being or has been carried out in conformity with the master plan or zonal development plan and in accordance with permissions granted under Section 14 and 15. Section 25 expressly permits entry to ascertain whether works are unauthorised or in breach of the conditions of permission, thereby making it a crucial investigative tool preceding action under Sections 26, 27, 28 or 28‑A.[6][1][4]

The section, however, balances enforcement with privacy and social‑religious sensitivities. Entry must generally be between sunrise and sunset, reasonable notice is to be given to the occupier or, if there is none, to the owner, women must be afforded an opportunity to withdraw, and due regard is to be had to social and religious usages of the occupants. Obstruction of entry is itself made a distinct offence punishable under Section 26(3), which reinforces the mandatory character of inspection powers.[11][4]