Definitely a dead bill now, but shows his intentions. The way I read it, was that prior law required such a certificate already for those confined for a consecutive 10 days. HB1355 made it a requirement for all applicants with the "10 consecutive day individuals" referencing it, not necessarily...
Costa's Firearms Legislation
http://mgaleg.maryland.gov/webmga/frmMain.aspx?pid=billpage&tab=subject3&id=hb1355&stab=01&ys=2013RS
Del. Costa sponsored a bill that would make it mandatory for a person seeking to purchase a firearm to receive a Certificate from a Physician, stating that they are...