in keeping with ----- regulations Certain regulations are in place, and they are sticking to them. They aren't changing anything.

it just means that they are doing as the law says, the sentence could end at Jerusalem. Police were on stand by in case of any unrest, as West Bank Palestinians are banned from Jerusalem >as required by< Israeli regulations. That isn't as good as "in keeping with", but that might make the meaning clearer.

因为要阻止西岸的巴勒斯坦人进入被以色列长期控制的耶路撒冷，为了防止任何骚乱，警察处于待命状态。

in keeping with 和…一致, 与…协调 His actions are not in keeping with his promises. 他言行不一。