The principal contractor for a construction project must ensure that signs are installed, that (a) show the principal contractor's name and telephone contact numbers (including an after hours telephone number); and(b) show the location of the site office for the project, if any; and(c) are clearly visible from outside the workplace, or the work area of the workplace, where the construction project is being undertaken.Penalty: In the case of (a) an individual, a fine not exceeding $3 600; or(b) a body corporate, a fine not exceeding $18 000.