4.—Before granting a firearm certificate to any person under this Act the superintendent of the Gárda Síochána or the Minister (as the case may require) shall be satisfied that such person—

( a ) has a good reason for requiring the firearm in respect of which the certificate is applied for, and

( b ) can be permitted to have in his possession, use, and carry a firearm or ammunition without danger to the public safety or to the peace, and

( c ) is not a person declared by this Act to be disentitled to hold a firearm certificate.