Section 28-408.4.5. Requirement for obtaining plate and/or seal

A holder of a
  certificate of competence shall obtain:
    1.  A  license,  plate  and  seal  upon establishing a master plumbing
  business conforming to  the  requirements  of  this  article  and  rules
  promulgated by the department; or
    2.  A  license  and  seal  upon  demonstrating  employment with a city
  agency.  The license shall clearly state: "The  bearer  of  this  master
  plumber  license  is a government employee and as such is not authorized
  to engage in  plumbing  contract  work  outside  of  his/her  government
  employment  and  within  such government employment shall only engage in
  maintenance,  replacement  and  repair   plumbing   work   on   existing
  buildings."  No  plate  shall  be  issued  to  a licensed master plumber
  employed by a city agency.