The proposal may be opened to other proponents that might have the capacity to undertake the unsolicited proposal and offer comparative bids. Comparative bids not only promote competition but also allow for cross checking as to the justifiability of the proposed project cost of the original proponent. Comparative bidders are required to submit their respective bid securities in accordance with the form and amount prescribed under Rule 7 of the IRR of RA 7718. Among the required tender documents is the draft contract as agreed upon by the LGU and original proponent and as approved by the LGU head. Note, however, that since the terms in the draft contract between the LGU and original proponent are considered final, comparative bidders are not allowed to negotiate on these pre-determined terms. Rule 10 (sections 10.10 to 10.17) of the IRR of RA 7718, provides the detailed process for comparative bidders.