О ТЕХНИКЕ БЕЗОПАСНОСТИ И ГИГИЕНЕ ТРУДА НА ПОРТОВЫХ РАБОТАХ. Конвенция. Международная организация труда. 06.06.79 152

Article 27

     1. Every lifting appliance (other than a ship`s derrick) having a
single safe working load and every item of loose gear shall be clearly
marked  with  its  safe  working  load  by stamping or,  where this is
impracticable, by other suitable means.
     2. Every  lifting  appliance (other than a ship`s derrick) having
more than one safe working load shall be fitted with  effective  means
of  enabling  the driver to determine the safe working load under each
condition of use.
     3. Every  ship`s  derrick  (other  than a derrick crane) shall be
clearly marked with the safe working loads applying when  the  derrick
is used:
     (a) in single purchase;
     (b) with a lower cargo block;
     (c) in union purchase in all possible block positions.