A legislative committee has extended emergency rules allowing captive deer farmers to opt out of the state's chronic wasting disease monitoring program without upgrading their fences. Generally, deer farms must enroll in the monitoring program to get Department of Natural Resources' approval for a single fence. If farms don't participate in the program they must install double or solid fencing. The DNR board in December adopted an emergency rule allowing farmers to opt out of monitoring without having to install double or solid fencing. Agency officials said the rule simplifies deer farm regulations.