Even if it's not RSS, Twitter, etc., most (democratic) governments will have a website or at least a page in the "flag" newspaper that outlines upcoming regulatory changes. Often this gives far more information about the change than other formats and may also allow you to "prepare" for upcoming changes that have not been made law but are in the process of being written.
Here in Canada it is called the
Canada Gazette, just to give you an idea.
Looks like
this may be a good start for your neck of the woods.
Anyways, to really keep abreast of changes, my company has our safety guy check the Gazette once a week. He has a list of regulations that he is looking out for which were provided to him by the department heads way back when we first started down the SMS path.
He will then forward any of the regulations that are seen to change back to those department heads for action via the SMS. That allows the company to not only demonstrate they have identified the regulatory change, but to also demonstrate short and long term corrective action plans. Thus, when the regulator shows up we demonstrate regulatory and SMS compliance.
Hope this helps!