How many years is the maximum total period, including extensions, for which a Director of Enforcement can hold office according to the provisions of section 25 of the Central Vigilance Commission Act?

Section 25. Appointments, etc., of officers of Directorate of Enforcement: Notwithstanding anything contained in the Foreign Exchange Management Act, 1999 or any other law for the time being in force:  (d) a Director of Enforcement shall continue to hold office for a period of not less than two years from the date on which he assumes office; Provided that the period for which the Director of Enforcement holds the office on his initial appointment may, in public interest, on the recommendation of the Committee under clause (a) and for the reasons to be recorded in writing, be extended up to one year at a time: Provided further that no such extension shall be granted after the completion of a period of five years in total including the period mentioned in the initial appointment.