These are pages which directly describe the canal themselves. They are in category:Locks.
Where possible, the maximal sizes are currently taken out into their related ship size. For other locks and canals, the restrictions will be evident from their descriptions page.
Many canals are regulated by a private or government body which imposes additional regulations. For these cases, the regulation requirements are currently (or planned) to have their own page; as well as an additional page for the regulating body. These can include navigatory instructions.
Where operated by an individual company, noted here.