Any person employed on the canal locks or any other post on the canal who shall report for duty in an intoxicated condition, or who becomes intoxicated while on duty, or who is absent from duty during working hours without permission, or who shall demand or receive, under any pretense or any form or manner whatsoever, any gratuity, valuable thing or what is commonly known as “scale money”from boatmen or others, or who unlawfully takes or receives any merchandise or other articles from floats navigated on the canals, shall be subject to dismissal.