1. Subject to article 16, paragraph 5, annual contributions to the general account shall be made in respect of each State Party by any person who was the receiver in that State in the preceding calendar year, or such other year as the Assembly may decide, of aggregate quantities exceeding 20,000 tonnes of contributing cargo, other than substances referred to in article 19, paragraph 1, which fall within the following sectors:

2. Annual contributions shall also be payable to the general account by persons who would have been liable to pay contributions to a separate account in accordance with article 19, paragraph 1 had its operation not been postponed or suspended in accordance with article 19. Each separate account the operation of which has been postponed or suspended under article 19 shall form a separate sector within the general account.