The Ohio Basic Building Code, as adopted in § 1420.01, applies to all buildings except as follows:
(a) Single-family, two-family and three-family dwelling houses which are not constructed of industrialized units, except where the context specifies mandatory applicability;
(b) Buildings owned by and used for a function of the United States government;
(c) Existing buildings where their location, parts, equipment and other items do not constitute a serious hazard;
(d) Buildings constructed in accordance with plans which have been approved prior to the effective date of the Ohio Basic Building Code;
(e) Buildings or structures which are incident to the use for agricultural purposes of the land on which such buildings or structures are located, provided such buildings or structures are not used in the business of retail trade (see Ohio R.C. §§ 3781.06 and 3781.061);
(f) Agricultural labor camps, as defined in Ohio R.C. § 3733.41;
(g) Single-family, two-family and three-family detached dwelling houses for which applications have been submitted to the Ohio Director of Human Services pursuant to Ohio R.C. § 5104.03 for the purposes of operating Type A family day-care homes, as defined in Ohio R.C. § 5104.01; and
(h) Buildings or structures which are designed, constructed and maintained in accordance with federal standards and regulations and are used primarily for federal and state military purposes where the U.S. Secretary of Defense, pursuant to 10 U.S.C. 2233(A)(1), (5) and (6) and 10 U.S.C. 2237, has:
(1) Acquired, by purchase, lease or transfer, and constructs, expands, rehabilitates or corrects and equips such buildings or structures as he or she determines to be necessary to carry out the purposes of 10 U.S.C. 2231 et seq.;
(2) Contributed to the state amounts for the acquisition, construction, expansion, rehabilitation and conversion by the state of such additional buildings or structures as he or she determines to be required because of the failure of existing facilities to meet the purposes of 10 U.S.C. 2231 et seq.; or
(3) Contributed to the state such amounts for the construction, alteration or rehabilitation of arms storage rooms as he or she determines to be required to meet a change in U.S. Department of Defense standards related to the safekeeping of arms.