From UFStarfleet LCARS
The UF Starfleet Good Conduct Ribbon is awarded to active UF Starfleet members who complete 2 consecutive years of "Honorable and faithful" service to United Federation Starfleet. Such service implies act in a manner befitting a starfleet officer. Professionalism and dedication to UFS ideals are paramount. If a member commits an offence, the 2 year mark is reset and the member must perform an additional 2 years of service without having to be disciplined before the ribbon may be authorized.
The member is to email email@example.com directly for this to be added to the Service Jacket
The criteria were amended by UF Starfleet Executive Order 0129, dated stardate 091226, to authorize the change from 1 year to 2 years of exemplary service