Each qualified voter present at the polls at 8 p.m. on election day shall be allowed to vote before the election judges commence their duties under this section. In accordance with the provisions of this article and regulations adopted by the State Board, after the last voter has voted in an election, the election judges shall follow the instructions issued by the election director for closing the polls and for performing the tasks required in the postclosing period. In accordance with this section, the election judges shall: secure the voting system to prevent further voting; if appropriate to the voting system, record the vote, produce vote totals for the polling place, and announce results to those present; complete all documents, records, and reports required by law or regulation after the closing of the polls; perform any other tasks assigned by the election director; assemble and account for materials to be returned to the local board, including, if applicable for the voting system used in that election: removable data storage devices from voting equipment; voted ballots; precinct registers; voting authority cards; signs and posters; records, reports, logs, affidavits, certificates, and other documents; keys to voting devices; poll books; and any other materials specified by the election director; assure that equipment and materials left in the polling place for retrieval at a later time are stored in a secure manner; and deliver materials and equipment to the local board and obtain receipts from the board certifying the delivery of the items. Judges may be observed, while performing their duties under this section, until they have finished their work and leave the premises by: authorized challengers, watchers, and observers in accordance with § 10-311 of this article; any candidate; and any other person lawfully present.