Employers have to pay wages- at least semi-monthly and no later than eight days after the end of the pay period (ESA, s 17). This section does not apply to public school teachers and professors (''ES Regulation'', s 40). Wages, as defined in Part 1, include salaries, commissions, work incentives, compensation for length of service (ESA, s 63), money by order of the tribunal, and money payable for employees’ benefit to a fund or insurer (in Parts 10 and 11 only). The definition does not include, for instance, expenses, penalties, gratuities, or travel allowance (however, travel time is considered time worked for which wages are payable, whereas commuting time is generally not).