(a) The commission shall require, as a condition of certification of any site and related facility, that the applicant acquire, by grant or contract, the right to prohibit development of privately owned lands in the area of the proposed site which will result in population densities in excess of the maximum population densities which the commission determines, as to the factors considered by the commission pursuant to Section 25511, are necessary to protect public health and safety.

If the applicant is authorized to exercise the right of eminent domain under Article 7 (commencing with Section 610) of Chapter 3 of Part 1 of Division 1 of the Public Utilities Code, the applicant may exercise the right of eminent domain to acquire such development rights as the commission requires be acquired.