(b) The term minor nature, as used in subdivision (n) of section 7208 of the Education Law, shall include but not be limited to the following projects:

1. (1) the design of water supply systems, sewage disposal systems, and storm drainage systems for individual lots or lots in subdivisions;

2. (2) the design of public water distribution systems for subdivisions where the project is within an existing water district approved by the appropriate Federal, State or local agencies, if:

   1. (i) the project does not involve source development, treatment, storage, transmission mains, pumping or pressure reduction; and
   2. (ii) the water mains, as determined by the appropriate Federal, State, or local agencies, do not require highly specialized and complex designs; and

3. (3) the design of public sanitary sewage collection facilities where the project does not include special complex designs such as, but not limited to, those related to extreme soil conditions requiring special bedding, special manholes (e.g., 20 feet or more), major stream or highway crossings, or tunnelling, and the project:

   1. (i) is within an existing sanitary sewer district or within the study area of a comprehensive sewer study as approved by the appropriate Federal, State or local agencies, if the project is limited to the design of sanitary sewer mains, collection sewers and appurtenances within the subdivision, including the design of connections to existing mains or trunks accessible outside the subdivision; or
   2. (ii) is not within an existing sanitary sewer district or within the study area of a comprehensive sewer study as approved by the appropriate Federal, State or local agencies.
4. (4) All designs for water supply and sanitary sewage collection facilities of a minor nature shall be submitted for review and approval to the appropriate Federal, State or local agencies prior to incorporation in the final plans submitted for subdivision approval.