In case of shipping companies, whose vessels are included in art.2b, or industrial groups or shipping companies affiliated to them that with their own managed or time chartered vessels regurarly load or unload oil product and/ortheir derivatives, produced or destined to industrial plsnts to har- bour depots or inland terminals, the fees in art.2a or in 2b shall be ap- plied, from1st call and for all calls, with the following reductions pro- vided that vessels, not in liner service, be handled in same port by the same Ship Agent:

Up to 24 calls no reductions for 25 " 16% reductions ( from 1st and for all calls) from 26 to 40 " 24% reductions ( from 1st and for all calls) from 41 to 50 " 38% reductions ( from 1st and for all calls) over 50 " 53% reductions ( from 1st and for all calls)

For calculating the reduction to be applied, refer to calls during the previous six months period. The reduced tariff for each call should not be in any case less than minimum of tarif,as per article to wich it refer.