What defines "reasonable restrictions"?

[Nuclear Unicorn]

66. Thank-you for your replies

(a) mandatory licensing of persons, so that anyone who wishes to acquire / possess firearms is first screened for risk factors, to the extent possible and reasonable
- this will reduce the risk of inappropriate candidates for firearms possession acquiring firearms

(b) mandatory registration of firearms, so that the identity of anyone who acquires / possesses a firearm is known and associated with that firearm, which can then be traced to that person if it is sold or otherwise transferred, or lost or stolen
- this will reduce the risk of straw purchases and of firearms being otherwise transferred by lawful owners to ineligible persons

(c) mandatory safe/secure storage of firearms
- this will reduce the risk of firearms being accessed by children or thieves, or used for improper purposes by owners

(d) public information and education campaigns to encourage compliance with the above requirements, e.g. about the risks involved in transferring firearms to ineligible persons and in failing to secure firearms when not in use

This is exactly the sort of direct response I was hoping for. I won't debate the points because that is not my intent and is some instances we would not have much debate.

It's my hope other gun control advocates would also add to the thread with similarly enumerated and explained propositions. At least then we know where the debates, if any, start.