As noted by the Board in its report for 2014,25 by 1 November 2014, the Governments of only a few African countries had invoked article 12, paragraph 10 (a), of the 1988 Convention, requiring them to be informed of shipments of substances in Table I of the Convention prior to their departure from the exporting country. Effective May 2015, the Government of the Sudan requires pre-export notification for imports of all substances in Tables I and II. In May 2015, Nigerian authorities dismantled at least three clandestine laboratories in south-east Nigeria, where toluene, a substance in Table II of the 1988 Convention that is commonly used as a solvent, had been found.