Section 28-408.3.1. Experience

All  applicants for a master plumber license
  shall submit satisfactory proof establishing that the applicant:
    1. Has had at least seven years total experience within the  10  years
  prior  to application in the design and installation of plumbing systems
  under the direct and continuing supervision of a licensed master plumber
  in the United States, with at least two years of such  experience  as  a
  registered  journeyman  plumber  in  accordance  with  the provisions of
  article 409, except that during the three  years  immediately  following
  the  effective  date of this code there shall be no requirement for such
  registered journeyman plumber experience;
    2. Has received a bachelor's  degree  in  engineering  or  appropriate
  engineering  technology from an accredited college or university and has
  had at least five years total experience within the seven years prior to
  application in the design and installation of plumbing systems under the
  direct and continuing supervision of a licensed master  plumber  in  the
  United  States,  where at least two years of such experience were in New
  York city;
    3. Is an architect or engineer with at least three years of experience
  within  the  five  years  prior  to  application  in  the   design   and
  installation  of  plumbing  systems  under  the  direct  and  continuing
  supervision of a licensed master plumber in the United States, where  at
  least one year of such experience was in New York city; or
    4.  Has  had at least seven years total experience within the 10 years
  prior to application, with at least two years of such experience working
  in the design and installation of plumbing systems under the direct  and
  continuing  supervision  of  a  licensed  master  plumber  in the United
  States. The balance of such  required  experience  may  be  obtained  by
  performing maintenance, replacement and repair plumbing work on existing
  buildings  while  in  the  employ  of a city agency under the direct and
  continuing supervision of a licensed master plumber supervisor  employed
  by  the  city  agency. Three years after the effective date of this code
  the two years experience in the  design  and  installation  of  plumbing
  systems set forth above may only be satisfied by working as a registered
  journeyman plumber.
    5.  An  employee  of a government agency, private inspection agency or
  other entity, acceptable to the  commissioner,  whose  duties  primarily
  involve the inspection of plumbing work for compliance with the New York
  city  plumbing  code  and/or  other  laws  relating to the installation,
  alteration or repair of plumbing systems shall be  credited  with  fifty
  percent  (50%)  of  the  number  of  years  that  he  or  she  has  been
  satisfactorily employed in such duties within the ten (10)  year  period
  prior  to application, which, however, in no event, shall exceed two and
  one-half (2 1/2) years credit of satisfactory experience. The balance of
  the required seven years must have  been  obtained  by  working  in  the
  design  and  installation  of  plumbing  systems  under  the  direct and
  continuing supervision of a licensed master plumber in the United States
  except that the requirement of paragraph 1 of  this  section  28-408.3.1
  that  an  applicant's  working  experience must have been within the ten
  (10) year period prior to application shall not apply to such balance of
  the work experience required pursuant to this paragraph.