newbury park had numerous attempts at establishing an independent municipality in the 1960s. the 1963 attempt at a cityhood election failed when janss’ rancho conejo industrial park and the talley corporation refused to join the efforts. jeffries told interviewers another reason why the cityhood election failed: cityhood supporters had to collect signatures from owners who represented 29% of the land area in newbury park. as the efforts only collected signatures from 29% of registered voters in newbury park, the petition never reached the ballot box.