What is International Code for the Safe Carriage of Grain in Bulk ?

This Code applies to ships regardless of size, including those of less than 500 tons gross tonnage, engaged in the carriage of grain in bulk, to which part C of chapter VI of the 1974 SOLAS Convention, as amended, applies.
The term grain covers wheat, maize (corn), oats, rye, barley, rice, pulses, seeds and processed forms thereof, whose behavior is similar to that of grain in its natural state.
For the purpose of this Code, the expression “ships constructed” means “ships the keels of which are laid or which are at a similar stage of construction”.
The term filled compartment, trimmed, refers to any cargo space in which, after loading and trimming as required under grain code, the bulk grain is at its highest possible level
The term filled compartment, untrimmed, refers to a cargo space which is filled to the maximum extent possible in way of the hatch opening but which has not been trimmed outside the periphery of the hatch opening either by the provisions of grain code  for all ships or  for specially suitable compartments.
The term partly filled compartment refers to any cargo space wherein the bulk grain is not loaded in the manner prescribed in grain code i.e(neither filled compartment, trimmed nor filled compartment , untrimmed).