Cal. Health & Safety Code § 33320.2

(a) The area included within a project and a project area may be either contiguous or noncontiguous. All noncontiguous areas of a project area shall be either blighted or necessary for effective redevelopment. An unblighted, noncontiguous area shall be conclusively deemed necessary for effective redevelopment if that area is being used predominantly for:
1. (1) The relocation of owners or tenants from other noncontiguous areas in the same project area or from other project areas in the community.
2. (2) The construction and rehabilitation of low- or moderate-income housing.
(b) An unblighted, noncontiguous area shall be deemed not necessary for effective redevelopment if that area is included for the purpose of obtaining the allocation of taxes from such area pursuant to Section 33670 without other substantial justification for its inclusion.
(c) The redevelopment agency shall not use the power of eminent domain for acquisition of property, other than vacant land, in noncontiguous, unblighted areas.