May 31

You also inquire as to the circumstances under which an individual believer may submit questions to the National Assembly or the House of Justice, directly. As you know, Bahá'ís turn to Bahá'í literature, their fellow-believers (particularly those well-versed in the Writings) and the local and national institutions of the Faith for answers to any question they may have. If these avenues are explored to the utmost and further clarification is still needed, the friends are free to refer to the House of Justice for such guidance. It is hoped that this information will be of assistance to you in your endeavours. 
(From a letter dated January 2, 1998, written on behalf of the Universal House of Justice to an individual believer)