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r-eaerai emergency Management Agency, ®H5 D (2) Require that all new construction and substantial improvements of resideritial structures within Zones Al-30,AE and AH zones on the community's FIRM have the lowest floor(including basement) elevated to or above the-base flood level, unless the community is granted an exception by the Federal OInsurance Administrator for the allowance of basements in accordance with §60.6 (b)or(c); )Require that all new construction and substantial improvements anon-residential structures within Zones A1-30,AE and AH zones on the community's firm(i)have the lowest floor(including basement) elevated to or above the base flood level or, (ii)together with attendant utility and sanitary facilities,be designed so that below the WO. 000 level the structure is watertight with walls substantially impermeable to the passage of water and with structural components having the capability of resisting hydrostatic and hydrodynamic loads and effects of buoyancy,• (4)Provide that where a non-residential structure is intended to be made watertight beiow the base flood level, .(i)a registered professional engineer.or architect shall develop and/or review structural • design,specifications,and plans for the construction,and shall.certify that the design and Methods of construction are in accordance with accepted standards of practice for meeting the applicable provisions of.paragraph (c)(3)(ii)or(c)(8)(ii)of ti.-4section, and (ii)a record of such certificates which includes the • specific elevation-(in.relation to mean .sea•level)to which such structures are floodproofe_d shall be maintained with the official designa•ted lbythe community under§• 39.22(a)(9)(iiii) •• • (5)Require,for all new construction and substantial improvements, that fully enclosed areas below • the lowest floor that-are usable solely for parking.of vehicles, building access or storage in an area other than a basement and which are subject to flooding shall be designed to automatically.equalize hydrostatic flood forces on exterior walls by allowing for the entry and exit of floodwaters,Desi ns for meeting this requirement iniist-eitlher be certified by a tegistered professfor al en9 neer off'architect or meet..or*deed the following minimum cnt ria:A.minitrhuth of MO`openings f avinig a total net are- of oil*than*rine square inch for every square foot of enclosed area subject to flooding shall be provided. The bottom of all openings shall be no higher than one foot above grade. Openings may be equipped with screens, louvers,valves,or other coverings or devices provided.that they permit the automatic entry and exit of floodv�afeta. . . . _ :. • (6)<RRequlre that manufactured homes that are placed or substantially improved within Zones Al-30, AH, and AE on the community's FIRM on sites (i)Outside of a manufactured home park or subdivision, (ii) In a new manufactured home park or subdivision, • (iii) In an expansion to an existing manufactured home park or subdivision, or (iv)In an existing manufactured home park or subdivision on which a manufactured home has incurred"substantial damage"as the result of a flood, be elevated on a permanent foundation such that the lowest floor of the manufactured home is elevated to or move the base'flood elevation and be securely anchored to an adequately anchored foundation system to resist floatation collapse and lateral movement. (7) Require within any AO zone on the community's FIRM that all new construction and substantial improvements of residential structures have the lowest floor(including basement)elevated above the highest adjacent grade at least as high as the depth number specified in feet on the community's FIRM (at least two feet if no depth number is specified); . (8)Require within any AO zone on the community's FIRM that all new construction and substantial improvements of nonresidential structures (i) have the lowest floor(including basement) elevated above the highest adjacent grade at least as high as the depth number specified in feet on the community's 0