I fully understand that we should only work for what we are hired for. However, if sometimes you are offered to do more, please consider it as an opportunity. Statutory Compliance is treated as a different department as the workload of maintaining the legal standards can be quite demanding. However, if your firm is small, it is quite doable. I don't mean to sound preachy, but please consider working in the Compliance Department as a skill addition. A thorough knowledge of the legal standards can only be achieved by working through it. You may need to step up your knowledge if this is the first time you are managing it.
Here's wishing you all the best!