Within 90 days after a dissolution, the board of directors shall return any liquid assets of the district to the landowners and local agencies in the same proportion that they have contributed to the revenue of the district, and shall provide by resolution for the distribution for ownership of any capital improvements and assets of the district. Within 90 days of a valid resolution ordering dissolution, any property owner within the district may offer an alternative plan for the distribution for ownership of any capital improvements and real assets of the district which shall be adopted if approved by the owners of more than 50 percent of the assessed valuation of the real property in the district.