NORTH Vancouver councils have agreed to bite the restraints bullet for the coming year. North Van City resolved Monday to hold its 1983 budget at this year’s level, while North Van District is considering a variety of budget formulas within a margin of 10 per cent. These would confine any in- crease to a maximum of five per cent and might even mean a budget reduction. City Mayor Jack Loucks possible this year. said he has already in- Meanwhile, District is structed depastment heads going tq choose between three budget formulas, the most extravagant of which would see expenditures im to maintam