Sale, Transfer, or Storage of Firearms; Revising the standard for adults and minors to be considered criminally negligent in the storage of a firearm under specified circumstances; revising an exception to the prohibition on storing or leaving a loaded firearm within the reach or easy access of a minor who obtains it and commits a specified violation; revising requirements for the safe storage of loaded firearms; providing criminal penalties if a person fails to properly secure or store a firearm and a minor gains access to the weapon as a result, etc.