Advance of portion of estimated costs.

1. Except for an extension made pursuant to paragraph (a) of subsection 2 of NAC 704A.500 , the developer shall pay to the telephone company, in cash before construction is begun on the extension of telephone facilities to and within a development, 50 percent of the estimated costs of constructing the extension within the development and within 100 feet of its boundary, minus any amount previously paid pursuant to subsection 3 of NAC 704A.440 . 2. The estimated costs must include the cost for preparation or the engineering drawings and designs. 3. The estimated costs must not include the cost of: (a) Nonrefundable advances; (b) Conduits and their installation; or (c) Cable used to provide telephone service to persons who reside more than 100 feet from the development or the cost of installing that cable.