The way I read this, everything from the main road south to the coast is in the south coast resilient corridor including Orange Hill.
" Travel north along Darling Street to the Llandilo Main Road (A2). Continue along to Little London through New Hope, Sheffield to Nonpareil Main Road. Continue to the roundabout at the intersection with Norman Manley Boulevard in Negril and intersects with the area described in Part I.The boundary only takes into consideration the main road to the sea shore. "
But residents homes are not businesses or approved Covid Resilient properties, so you should not visit them there unless you quarantine the whole family for 14 days.