Modifies provisions relating to the carrying of firearms on public transit systems

SB 77 modifies existing regulations concerning the carrying of firearms on public transit systems. Based on the provided abstract, the bill aims to change these provisions. However, the specific details of these modifications - such as whether they expand or restrict firearm access, or how they will be implemented - are not available in this context. Therefore, it is not possible to describe the key mechanisms or who is directly affected beyond those who carry firearms and utilize public transit.