In an area that the President has declared a major disaster in accordance with section 5170 of title 42, the Secretary may carry out a watershed assessment to identify, to the maximum extent practicable, specific flood risk reduction, hurricane and storm damage reduction, ecosystem restoration, or navigation project recommendations that will help to rehabilitate and improve the resiliency of damaged infrastructure and natural resources to reduce risks to human life and property from future natural disasters.
A watershed assessment carried out paragraph  (1) may identify existing projects being carried out under 1 or more of the authorities referred to in subsection (b)(1).
All requirements applicable to a project under the Acts described in subsection (b) shall apply to the project.
A watershed assessment under subsection (a) shall be initiated not later than 2 years after the date on which the major disaster declaration is issued.
For any major disaster declared in a territory of the United States before October 23, 2018, all activities in the territory carried out or undertaken pursuant to the authorities described in this section shall be conducted at full Federal expense unless the President determines that the territory has the ability to pay the cost share for an assessment under this section without the use of loans.