SANDAG has three main options available for adjusting TransNet expenditures. First, TransNet lays out an option for 2/3 of the SANDAG Board to modify the distributions and project lists to achieve the long-term planning strategy in accordance with the RTP.[25] These modifications can occur at any time during the 40-year timeline of the measure. Additionally, it also mandates a ten-year comprehensive review of the ordinance to occur in 2019, 2029, and 2039.[26] Suggested changes brought forth in this review are also subject to the 2/3 requirement for modifications.