Here are the official docuements of ISF filling from CBP website, we can get the official answers for most of the case after go throug below:
Introduction of ISF:
Importer Security Filing and Additional Carrier Requirements General Information
2 key documents for ISF filer (Customs Broker/ NVOCC/ FF):
FAQs: Importer Security Filing "10+2" Program
"10+2" Program: Importer Presentation
Other Documents for Reference
Importer Security Filing and Additional Carrier Requirements - Final Rule
Stow Plans and Container Status Messages