45.5—Seasonal application of load lines.
         For the purposes of the law and regulations prohibiting submergence of load lines (46 U.S.C. 88c;  46 CFR 42.07-10 ), the fresh water and salt water load lines marked under this part apply during the following seasons:
    
    
    
        
        (b) 
         Except for hopper dredges operating at working freeboards in accordance with subpart C of  part 44 of this chapter, the Assigning Authority may not allow for lesser freeboards.