Note: When the shell and heads materials are the same thickness, they may be combined, (Shell & head matl, yyy * * *).
Note 1 to paragraph ( c ): See §173.315(a) of this chapter regarding water capacity.
Note 2 to paragraph ( c ): When the shell and head materials are the same thickness, they may be combined (Shell & head matl, yyy***).
49 C.F.R. §178.338-18