(a) Any document required by this subpart to be filed or served within a certain period of time, will be considered filed or served as of the time of receipt by the party with or upon whom filing or service is required.

(b) Saturdays, Sundays, and federal holidays shall be included in computing the time allowed for the filing or serving of any document or paper; except that when such time expires on a Saturday, Sunday or federal holiday, such period shall be extended to include the next following business day.