7 C.F.R. § 4280.110
(b) Application submittal. Applications must be submitted in accordance with the provisions of this subpart unless otherwise specified in a Federal Register notice. Grant applications and combined grant and guaranteed loan applications for financial assistance under this subpart may be submitted at any time.
(g) Technical report. The following technologies: Hydrogen, ocean energy, geothermal electric generation, anaerobic digesters and biogas, biomass, hybrid applications, RES with storage components, and EEI or technologies as amended via Federal Register notification or posted on the Agency's website, must provide a technical report as specified in §§ 4280.118(d) 4280.119(b)(4), and 4280.120(b)(3) and 4280.120(b)(4), and must comply with the provisions specified in paragraphs (g)(1) through (3), as applicable, of this section:
(1) Technical report format and detail. The information in the technical report must follow the format specified in § 4280.120(b)(3), § 4280.120(b)(4), and Appendices A through C of this subpart, as applicable. Supporting information may be submitted in other formats. Design drawings and process flowcharts are encouraged as exhibits. In addition, information must be provided, in sufficient detail, to:
(h) Time limit on use of grant funds. Except as provided in paragraph (h)(1) of this section, grant funds not expended within 2 years from the date the Financial Assistance Agreement was signed by the Agency will be returned to the Agency.