Which rule pertains specifically to the removal of adhesive postage from inmate postcards?

The rule that specifically addresses the removal of adhesive postage from inmate postcards is DK-1. This rule is crucial for maintaining security and integrity within the detention facility. It is designed to prevent the introduction of contraband and to ensure that all incoming and outgoing mail meets the facility's guidelines.

Adhesive postage can potentially be tampered with or may be used to conceal contraband, which poses a significant security risk. By having a specific rule in place, the facility can consistently enforce procedures to manage inmate correspondence safely.

The other options pertain to different aspects of facility rules and regulations, but DK-1 uniquely focuses on managing adhesive postage, ensuring that there are clear and enforceable standards in place for how mail is processed.