9 5 ▁- ▁G over ning ▁bodies ▁signed ▁the ▁Part icip ating ▁Agency ▁Ag re ement ▁March ▁ 5 , ▁ 1 9 9 6 ▁- ▁San ▁Diego ▁County ▁Board ▁author ized ▁contract ▁with ▁Motor ola ▁& ▁finan cing ▁of ▁remaining ▁R CS ▁components ▁December ▁ 1 9 9 6 ▁- ▁Const ruction ▁of ▁ 4 3 ▁radio ▁repe ater ▁sites ▁began ▁May ▁ 1 9 9 8 ▁- ▁Part icip ating ▁ag encies ▁began ▁using ▁the ▁R CS ▁December ▁ 1 9 9 9 ▁- ▁San ▁Diego ▁County ▁portion ▁of ▁the ▁project ▁completed ▁March ▁ 5 , ▁ 2 0 0 1 ▁- ▁Sant ana ▁High ▁School ▁shooting ▁March ▁ 2 2 , ▁ 2 0 0 1 ▁- ▁Gran ite ▁Hills ▁High ▁School ▁shooting ▁October ▁ 2 5 , ▁ 2 0 0 3 ▁- ▁C ed ar ▁Fire ▁and ▁Parad ise ▁Fire ▁June , ▁ 2 0 1 7 ▁- ▁F CC ▁mand ated ▁ 8 0 0 M Hz ▁re - band ing ▁begins ▁on ▁the ▁R CS , ▁with ▁the ▁N ortheast ▁Cell ▁being ▁the ▁first . ▁ ▁Member ▁ag encies ▁ ▁Count ies ▁San ▁Diego ▁Imperial ▁ ▁C ities ▁ ▁San ▁Diego ▁County ▁Car ls bad ▁Ch ula ▁V ista ▁Cor on ado ▁Del ▁Mar ▁El ▁C aj on ▁Enc init as ▁Es cond ido ▁Imperial ▁Beach ▁La ▁M esa ▁Lem on ▁Gro ve ▁National ▁City ▁Port ▁of ▁San ▁Diego ▁Pow ay ▁O ce ans ide ▁San ▁Mar cos ▁S ante e ▁Sol ana ▁Beach ▁V ista