21. Any difficulty in the interpretation or application of section 19 or of the regulations passed under section 20 must be referred to the building commissioner, who may refer it to a building deputy-commissioner.
The building commissioner shall also, on the application of any interested party, hear and settle disputes as to competency which relate to the practice of any trade or occupation. He may refer the dispute to a building deputy-commissioner.
1970, c. 35, s. 2; 1984, c. 27, s. 89; 1995, c. 8, s. 12.