( 1 ) THE petitioner are owners of building No. 2831 to 2845 at Bara Bazar, Kashmiri Gate Delhi. The original plan for construction of commercial building consisting of shops and offices was sanctioned by the respondents in 1966. Broadly speaking there were three blocks of construction. Block a and c were connected by Block b . Block a and Block c were constructed by the petitioners and they applied for a completion certificate in 1969. There is some dispute regarding issuance of the completion certificate as the respondents claim that there were certain deviations and unauthorised constructions, and the petitioners claim deemed issuance u/s 346. According to the original sanction the entire construction in Blocks a , b and c was to be completed within one year. No extension of time was sought before the completion of one year. The sanction was thus exhausted after the said stipulated period. Thirteen years thereafter, that is, on 2. 1. 1979 the petitioners applied to the respondents for revalidation of the original sanctioned plans and for extension of time for construction of Block b . The respondents were faced with several problems, such as removal of th