Efficient Infrastructure Part 1—Efficiency Grants for State and Local Governments Sec. 32101. Energy efficient public buildings. Sec. 32102. Energy efficiency and conservation block grant program. Part 2—Smart Building Acceleration Sec. 32201. Short title. Sec. 32202. Findings. Sec. 32203. Definitions. Sec. 32204. Federal smart building program. Sec. 32205. Survey of private sector smart buildings. Sec. 32206. Leveraging existing programs. Sec. 32207. Report. Part 3—Weatherization Assistance Program Sec. 32301. Short title. Sec. 32302. Weatherization assistance program. Sec. 32303. Report on waivers. Part 4—Smart Energy and Water Efficiency Sec. 32401. Short title. Sec. 32402. Smart energy and water efficiency program. Part 5—Accelerated Adoption of Energy Efficient Engines and Vehicles Sec. 32501. Reauthorization of diesel emissions reduction program. Sec. 32502. Reauthorization of clean school buses program. Part 6—Energy Improvements at Public School Facilities Sec. 32601. Grants for energy efficiency improvements and renewable energy improvements at public school facilities. Part 7—Homeowner Managing Energy Savings Sec. 32701. Short title. Sec. 32702. Definitions. Sec. 32703. Home Energy Savings Retrofit Rebate Program. Sec. 32704. Contractors. Sec. 32705. Rebate aggregators. Sec. 32706. Quality assurance providers. Sec. 32707. Transferability of home energy savings rebate. Sec. 32708. Home Energy Savings Retrofit Rebate Program. Sec. 32709. Grants to States and Indian Tribes. Sec. 32710. Quality assurance program. Sec. 32711. Evaluation report to Congress. Sec. 32712. Administration. Sec. 32713. Treatment of rebates. Sec. 32714. Penalties. Sec. 32715. Funding. Sec. 32716. Pilot program. Subtitle C—Energy Supply Infrastructure Part 1—Low-Income Solar Sec. 33101. Short title. Sec. 33102. Loan and grant program for solar installations in low-income and underserved areas. Part 2—Safe, Affordable, and Environmentally Sound Natural Gas Distribution Sec. 33201. Improving the natural gas distribution system. Part