The split in this system occurs at Point Conception, California due to weak upwelling in the South and strong upwelling in the north. The Canary Current is an eastern boundary current of the North Atlantic Gyre and is also separated due to the presence of the Canary Islands.
The landlord can raise the rent or change the rules any time. S/he must give you written notice about the changes at least 30 days before the end of a rental period. (Example: if the rental period ends on June 30th, the landlord must give you written notice of a change before June 1st.)
If you are a tenant at will (no written lease), you must give your landlord a 30 day written notice. The notice period should end on a rent day. You and your landlord can agree to a shorter notice period, if you agree in writing. If you have a lease, read it to see what kind of notice you must give.