Handgun permits issued by Pennsylvania, Virginia and Delaware would be valid in Maryland under legislation proposed by Cecil County Republican lawmaker Michael D. Smigiel Sr. He proposed the change to Maryland’s firearms law, which also would extend to licenses to carry concealed firearms. A House committee will hold a hearing on the legislation. Maryland gun permit applicants must be 18 years of age or older and have a “good and substantial reason” to carry the handgun. Several categories of people, including addicts and those who exhibit a propensity for violence or instability, are barred from receiving gun permits.