Where the county board determines, as provided in Section 4-5, that there shall be a re-registration before the June, 1970, primary, there shall, subject to the provisions of Section 4-6, be 3 days of re-registration in each precinct. The first of such 3 days of re-registration shall be Friday, November 21, 1969; the second, Friday, December 19, 1969; and the third, Tuesday, January 15, 1970. On each of the 3 days of re-registration, the registration place or places shall open at 8:00 a.m. and remain open until 9:00 p.m.
     Re-registration provided by this Article 4 shall be conducted by the county clerk, shall be at the office of such clerk or in the precinct or in the offices of the respective deputy registration officers appointed by the county clerk as hereinabove in this Article provided, and shall be upon registration record cards in the manner provided by this Article. Such re-registration shall constitute a permanent registration subject to revision and alteration in the manner hereinafter provided. All registrations shall be on registration record cards provided by the county clerk in accordance with the provisions of this Article 4.
     Immediately following the last day of precinct re-registration in 1970, all permanent registration records compiled before November 21, 1969, shall be destroyed if no election contest is pending in which such records are material.