Section 26D(f) in The Punjab Scheduled Roads and Controlled Areas Restriction of Unregulated Development Rules, 1965
(f)undertake to start construction on the said land within a period of six months and complete the construction within a period of [two years] [Substitutedfor 'one year' vide Haryana Government Notification No 8DP- 97/3423 dated 25-3-1997.] from the date of issue of order permitting the charge of land use :