Government Code section 87103 provides in part: "A public official has a financial interest in a decision within the meaning of Section 87100 if it is reasonably foreseeable that the decision will have a material financial effect, distinguishable from its effect on the public generally, on the official, a member of his or her immediate family, or on any of the following: "(a) Any business entity in which the public official has a direct or indirect investment worth one thousand dollars ($ 1,000) or more. "(b) Any real property in which the public official has a direct or indirect interest worth one thousand dollars ($ 1,000) or more. "(c) Any source of income, other than gifts and other than loans by a commercial lending institution in the regular course of business on terms available to the public without regard to official status, aggregating two hundred fifty dollars ($ 250) or more in value provided to, received by or promised to the public official within 12 months prior to the time when the decision is made. "(d) Any business entity in which the public official is a director, officer, partner, trustee, employee, or holds any position of management. "(e) Any donor of, or any intermediary or agent for a donor of, a gift or gifts aggregating two hundred fifty dollars ($ 250) or more in value provided to, received by, or promised to the public official within 12 months prior to the time when the decision is made. the amount of the value of gifts specified by this subdivision shall be adjusted biennially by the commission to equal the same amount determined by the commission pursuant to subdivision (f) of Section 89503. "For purposes of this section, indirect investment or interest means any investment or interest owned by the spouse or dependent child of a public official, by an agent on behalf of a public official, or by a business entity or trust in which the official, the official's agents, spouse, and dependent children own directly, indirectly, or beneficially a 10-percent interest or greater." Government Code section 87103, subdivision (e) requires that contributions received within the 12 months prior to the vote be aggregated to determine if the financial threshold for disqualification from participation has been reached.