In setting the rates of pay, a tariff is adopted by the Governor in Council on the recommendation of the Chief Electoral Officer. That provides for the rates of pay for all elections officers and for a lot of the expenses that are incurred by the Chief Electoral Officer or returning officers during an election period. Those are in accordance with a regulation adopted by the Governor in Council on the recommendation of the CEO. You are right that the Chief Electoral Officer can draw directly from the consolidated revenue fund to pay for these expenses.
On April 29th, 2014. See this statement in context.