; and (2) may not put any limit on how many voted and sealed absentee ballots any designated person can return to the post office, a ballot drop off location, tribally designated building, or election office. (c) Rule of construction Nothing in this section shall be construed to affect the authority of States to conduct elections for Federal office through the use of polling places at which individuals cast ballots. (d) No effect on ballots submitted by absent military and overseas voters Nothing in this section may be construed to affect the treatment of any ballot submitted by an individual who is entitled to vote by absentee ballot under the Uniformed and Overseas Citizens Absentee Voting Act ( 52 U.S.C. 20301 et seq.). (e) Effective date This section shall apply with respect to the regularly scheduled general election for Federal office held in November 2020 and each succeeding election for Federal office. . (b) Conforming amendment relating to enforcement Section 401 of such Act ( 52 U.S.C. 21111 ) is amended by striking and 303 and inserting 303, and 303A . (c) Clerical amendment The table of contents of such Act is amended by inserting after the item relating to section 303 the following new item: Sec. 303A. Uniform availability of absentee voting to all voters. . 3. Election mail (a) Treatment of ballots as first-Class mail Any ballot in an election for public office sent in the United States mails shall be categorized, handled, and delivered as first-class mail by the United States Postal Service. (b) Policy on postmarks It shall be the policy of the United States Postal Service to postmark, which shall include any imprinted indicia from the Postal Service that indicates the date of receipt, all election mail processed by the Postal Service. (c) Same-Day processing The United States Postal Service shall ensure, to the maximum extent practical, that election mail is processed and cleared from any postal facility or post office on the same day it is received at such a facility or post office. 4.