Back in September we reported on an invitation for comments on how to amend the rules regulating tower construction near AM stations. At long last the Second Further Notice of Proposed Rulemaking (SFNPRM) has made it into the Federal Register.   Publication in the FedReg in turn establishes the dates for comments. If you want to file comments in response to the SFNPRM, you’ve got until January 12, 2009; reply comments are due by February 9, 2009.