So, no hard answer there. When Iíve had to hire staff, I usually know itís coming and preemptively collect resumes, then take the first few I get when the job posting goes up and look through them to find any other good ones to look at. In those situations, my principal has wanted interviews within 2 weeks, so it moves fast.
2). I donít think there is requirement State wide? Some districts might have a local policy. Personally, I think itís good professional decorum to given an answer within 48 hours.
Keep in mind you could theoretically accept a job, and then give it up if you get another offer if youíre not within the 45 day rule. Dong that would burn some serious bridges though and isnít recommended.