辖 is mostly a bound form in modern Chinese — you'll meet it in compounds like
管辖 (to have jurisdiction over),
直辖市 (municipality directly under central government, e.g. Beijing),
辖区 (jurisdictional area),
所辖 (under the jurisdiction of). The original meaning was the linchpin pin that locked a wheel onto an axle, hence 'that which holds something in place / under control'.
