I did a quick word search "Charter" under the Canada Shipping Act, and got one hit back on the word "Charter". Here it is:
"bare-boat charter means a vessel charter agreement under which the charterer has complete possession and control of the vessel, including the right to appoint its master and crew."
I think this might be the concept Yamsailor is referring to. But this is specifically a "bare boat charter", not any contract or charter agreement. You can put pretty well whatever you like as terms in a charter agreement as long both parties agree to it and nobodies doing anything illegal.
Etymology might be useful in this case, here's an etymology search for the word "charter"
charter (n.) Look up charter at Dictionary.comc. 1200, from Old French chartre (12c.) "charter, letter, document, covenant," from Latin chartula/cartula, literally "little paper," diminutive of charta/carta "paper, document" (see chart (n.)).charter (v.) Look up charter at Dictionary.comearly 15c., "provide with a charter," from charter (n.). Meaning "to hire" is attested from 1806. Related: Chartered; chartering.
Here's one for "rent"
rent (v.) Look up rent at Dictionary.commid-15c., "to rent out property, grant possession and enjoyment of in exchange for a consideration paid," from Old French renter "pay dues to," or from rent (n.1). Related: Rented; renting. Earlier (mid-14c.) in the more general sense of "provide with revenue." Sense of "to take and hold in exchange for rent" is from 1520s. Intransitive sense of "be leased for rent" is from 1784. Prefix rent-a- first attested 1921, mainly of businesses that rented various makes of car (Rentacar is a trademark registered in U.S. 1924); extended to other "temporary" uses since 1961.rent (n.1) Look up rent at Dictionary.com"payment for use of property," mid-12c., a legal sense, originally "income, revenue" (late Old English), from Old French rente "payment due; profit, income," from Vulgar Latin *rendita, noun use of fem. past participle of rendere "to render" (see render (v.)).