Yes. A Maine Coon is a domestic cat, and ordinary pet ownership does not require a dangerous wild animal licence simply because the cat is large. Ownership still carries welfare responsibilities, and housing agreements may have their own conditions about pets. Check those before bringing a cat home. Microchipping rules also depend on where you live: in England, owned cats must normally be microchipped and registered by 20 weeks of age, including indoor cats. Keep the database contact details current.
Buying, breeding, boarding or importing animals can involve additional rules that are different from keeping an ordinary pet. If an advertisement describes a wildcat hybrid rather than a Maine Coon, do not assume the same position applies. Ask the relevant authority before paying a deposit or arranging transport. After adopting or moving home, check the registered keeper details with the microchip database; having a chip fitted is not the same as keeping its record current.
For product comparisons alongside this advice, see Velvet Nest and Sterling Court litter tray. The details below explain their sizes and uses.
Further reading: cats.org.uk; cats.org.uk; gov.uk; gov.uk; gov.uk.
Velvet Nest
Sterling Court litter tray
Taj-MeowHall