Except as otherwise provided in this Section, all lots created after the effective date of this Section shall abut a public street at least to the extent necessary to comply with the access requirement set forth in Section 400.693. For purposes of this Subsection, the term "public street" includes a pre-existing public street as well as a street created by the subdivider that meets the public street standards of these regulations and is dedicated for public use. Unless the recorded plat of a subdivision, after the effective date of these regulations, clearly shows a street to be private, the recording of such a plat shall constitute an offer of dedication of such street.