Where were the “advisory opinions” when only 1 board member was negotiating contracts?

This is one of many examples that can be found on-line where less than 3 board members negotiated a contract:

http://www.perc.state.nj.us/publicsectorcontracts.nsf/Contracts%20By%20Employer/A3F3A1EF3B760BF485257A320050EA85/$File/Lodi%20BE%20and%20Lodi%20Admin%20Assn%202012.pdf?OpenElement