<prompt> Translate the following text to Swahilian extended voluntary negotiation period obtain a certification confirming their public safety status from the department head responsible for system oversight.  <response>: Mkataba wa Usalama wa Umma Usalama wa Umma ni mkataba wa usalama wa umma unaoidhinishwa na Mkurugenzi wa Idara ya Usalama wa Umma anayehusika na Usalama wa Umma. 