(a)Tanks or piping systems that are separated from the hull structure by thermal isolation must be electrically bonded to the hull structure by a method under paragraph (c) of this section.
(b)A pipe joint or a hose connection fitting that has a gasket must be electrically bonded by a method under paragraph (c) of this section that bonds—
(1)Both sides of the connection to the hull structure; or
(2)Each side of the connection to the other side.
(c)An electrical bond must be made by at least one of the following methods:
(1)A metal bonding strap attached by welding or bolting;
(2)Two or more bolts that give metal-to-metal contact between the bolts and the parts to be bonded; or
(3)Other metal-to-metal contact between adjacent parts under designed operating conditions.