The websites of the Library of Congress and the Copyright Office, which include the site used by the Copyright Royalty Board, will be down for maintenance this weekend. This includes the portal for filing cable and satellite royalty claims, which will be unavailable 5 p.m. ET, Friday, July 29, through Sunday, July 31. Claims by broadcast TV stations and others for royalties for the carriage by satellite TV and cable systems of programming to which they own the copyright are due on August 1 (technically the claims are due by the end of July but, as July 31 is Sunday, that deadline defaults, according to the CRB site here, to August 1). To avoid the possibility of an untimely (and therefore invalid) filing, filers should consider printing and filing a paper claim, following the instructions on the fillable PDF form on the CRB website. For last minute filers, consider this warning.