The responding party must serve a written response on the requesting party not later than the 30th day after the date the requesting party serves a request under Section 301.051, except that:
(1) a defendant served with a request before the defendant's answer is due is not required to respond until the 50th day after the date the request is served; and
(2) a response to a request under Section 301.052(a)(6) is governed by Subchapter C.