(1) Whenever a particular thing is required to be filed with or submitted to the department within a certain number of days and the last day falls on a Saturday, Sunday, or holiday, the filing or submission may be done no later than the next business day. This subsection does not apply to the filing of biweekly claims under ARM 24.11.443.

(2) Except as provided for the filing of biweekly claims under ARM 24.11.443, if a filing or submission is required or allowed to be done by telephone, the person wishing to make the filing or submission must contact a customer service representative no later than the last day allowed to make the filing or submission, by calling the claims processing center during the center's published business hours, and provide such information as the customer service representative may require to establish the identity of the person and the nature of the filing or submission the person intends to make. If a filing or submission is required or allowed to be done in writing, the writing must be delivered to the department either by mail or by facsimile and must contain such information as is needed to establish the identity of the person making the filing or submission and the nature of the filing or submission the person intends to make. Filings or submissions by mail must be postmarked no later than the last day allowed to make the filing or submission. Filings or submissions by facsimile must be received no later than the last day allowed to make the filing or submission. If the filing or submission is required or allowed to be done by electronic mail, the electronic mail message must be transmitted no later than the last day allowed to make the filing or submission and must contain such information as is needed to establish the identity of the person making the filing or submission and the nature of the filing or submission the person intends to make.

(3) Any determination, redetermination, or decision of an appeals referee relating to a claimant's entitlement to or eligibility for benefits or to an employer's chargeability for benefits becomes final unless an interested party appeals the determination, redetermination, or decision within ten days after the determination, redetermination, or decision was mailed to the party's last known address.

(4) The department may accept any filing or submission made after the time allowed or extend the time allowed for any filing or submission to be made if the department determines that there is good cause to do so.

(5) Any individual can obtain an answer to an inquiry concerning the unemployment insurance program by submitting the inquiry by telephone, by facsimile, by mail, or by e-mail.