If a dealer or person does not receive notification of disapproval or a hold for an open disposition of a criminal proceeding within the 7-day waiting period after submission of the regulated firearm application, then the dealer or person may sell, rent, or transfer the regulated firearm in accordance with all other applicable provisions of this chapter and Public Safety Article, Title 5, Subtitle 1, Annotated Code of Maryland. The dealer or person shall submit the firearm application at the time that the purchase or transfer is completed and shall include a notation that the firearm was purchased or transferred before the application was marked as not disapproved. Upon receiving a firearm application that contains a notation that the firearm was purchased or transferred before the application was marked as not disapproved, the Secretary shall: If the application is not disapproved after the investigation under Regulation .18 of this chapter, mark the application as not disapproved and notify the dealer or person. If the application is disapproved after the investigation under Regulation .18 of this chapter, mark the application as disapproved, notify the dealer or person, and notify the applicant. The sale or transfer of a regulated firearm to a law enforcement officer or a member of the armed forces of the United States or the National Guard shall be processed as any other sale or transfer. The 7-day waiting period is in effect unless certification is received from the individual’s commanding officer that the firearm is to be used in an official capacity.