elseif ($nick !isop $chan) { msg # You do not have authority to do that action. }

else ($nick !isop $chan) { msg # You do not have authority to do that action. }

and

var %time_left = Unspecified
if ($timer( $+(%user,unjailmsg) ) != $null) { var %time_left = $duration( $timer($+(%user,unjailmsg)).secs ) }

Unspecified then vars again?

could use only
%time_left = $duration( $timer($+(%user,unjailmsg)).secs

5/10