Nature-based Coastal Resiliency; Authorizes certain dredging & filling of submerged lands & placement of certain shorelines & seawalls within Biscayne Bay Aquatic Preserve; authorizes erection of specified structures within aquatic preserves; requires DEP to develop by specified date guidelines & standards for nature-based methods to address coastal resiliency & rules for statewide permitting process for such coastal resiliency; requires DEP & local governments to promote nature-based solutions for coastal resiliency.