They need to file their initial registration. Once they have filed their initial registration, if they communicate with a designated public office holder then they have to file a monthly communication. They have 15 days in the next month to file the monthly communication. If they need to amend their registration or are terminating it, then again they have until the 15th of the next month to do so. If for some reason they have had a lot of communications, but no communications with the designated public officer holder, and there has been no need to amend the registration, then after five months the act still requires them to re-certify that everything is still correct in their registration.
On April 20th, 2010. See this statement in context.