3. Reference to a rent tribunal shall be by written notice. The notice shall specify the address of the house or part of a house to which the restricted contract relates, the names of the lessor and lessee, and the address of the lessor. The notice may be delivered at an office of the rent assessment panel, in which case it shall be deemed to have reached the rent tribunal on the day when it is so delivered, or may be posted to the rent assessment panel, in which case it shall be deemed to have reached the rent tribunal on the day when it would be delivered in the ordinary course of post.