1206.258—Washing allowances—general.
        
        (a) 
         For ad valorem leases subject to  § 1206.257 of this subpart, ONRR shall, as authorized by this section, allow a deduction in determining value for royalty purposes for the reasonable, actual costs incurred to wash coal, unless the value determined pursuant to  § 1206.257 of this subpart was based upon like-quality unwashed coal. Under no circumstances will the authorized washing allowance and the transportation allowance reduce the value for royalty purposes to zero.
    
    
        
        (b) 
         If ONRR determines that a lessee has improperly determined a washing allowance authorized by this section, then the lessee shall be liable for any additional royalties, plus interest determined in accordance with  § 1218.202 of this chapter, or shall be entitled to a credit without interest.
    
    
    
        
        (d) 
         No cost normally associated with mining operations and which are necessary for placing coal in marketable condition shall be allowed as a cost of washing.
    
    
        
        (e) 
         Coal washing costs shall only be recognized as allowances when the washed coal is sold and royalties are reported and paid.