To be eligible for assistance under this program:

(a) A project meeting the definition of an eligible project under 505.5 of this section located fully within one State shall have eligible project costs that are quantified in the project proposal as equal to or exceeding the lesser of:

(1) $500,000,000; or

(2) 75 percent of the amount of Federal highway assistance funds apportioned for the most recently completed fiscal year to the State in which the project is located.

(b) A multi-State project meeting the definition of an eligible project under 505.5 of this section shall have eligible project costs that are quantified in the project proposal as equal to or exceeding the lesser of:

(1) $500,000,000; or

(2) 75 percent of the amount of Federal highway assistance funds apportioned for the most recently completed fiscal year to the State in which the project is located that has the largest apportionment.