The State of Alaska upon its admission into the Union shall be entitled to one Representative until the taking effect of the next reapportionment, and such Representative shall be in addition to the membership of the House of Representatives as now prescribed by law: Provided, That such temporary increase in the membership shall not operate to either increase or decrease the permanent membership of the House of Representatives as prescribed in the Act of August 8, 1911 (37 Stat. 13) nor shall such temporary increase affect the basis of apportionment established by the Act of November 15, 1941 (55 Stat. 761; 2 U.S.C., section 2a), for the Eighty-third Congress and each Congress thereafter.