No lands designated as urban reserve (agricultural) on the Redlands general plan map as the same existed on June 1, 1987, shall be rezoned or changed to a different general plan designation which would permit a density higher than the R-E designation as the same existed on June 1, 1987, in the Redlands city zoning ordinance unless the city council finds, by four- fifths (4/5) affirmative vote by the total authorized council membership, that each and all of the following is true:
A. There are specific overriding benefits to the city and its residents and taxpayers from the proposed density increase;
B. The proposed density increase will not cause any adverse environmental impacts, either individually or cumulatively, directly or indirectly;
C. The proposed density increase will not convert viable agricultural lands to nonagricultural uses;
D. The proposed density increase will not have a growth inducing effect on other property. (§ 4 of measure N, passed by voters 11-3-1987: § 10 of proposition R, passed by voters 11-7-1978)