Section 15(3)(b) in The Oil Industry Development Board Staff Provident Fund Rules, 2013
(b)The subscriber shall submit a declaration not later than the 31st day of December of every year as to whether the house or the house-site, as the case may be, continues to be in his possession or has been mortgaged or otherwise transferred or let out as aforesaid and shall, if so required, produce before the Secretary on or before the date specified by the Secretary in that behalf, the original sate, mortgage or lease deed and also the documents on which his title to the property is based.