(1) Whether his department has undertaken and/or commissioned any study on labour brokers in the past four years; if not, why not; if so, what are the relevant details; (2) whether there are any current labour regulations and/or legislation governing labour brokers and individuals who work for them; if not, why not; if so, what are the relevant details; (3) how many (a) complaints received by his department have been related to labour brokers in each year since the 2005-06 financial year up to the latest specified date for which information is available and (b) of these complaints have been investigated in each year?