The United States Coast Guard maintains a useful resource page on ballast water management.
Its extensive list of frequently asked questions (FAQ) on the subject clarifies topics ranging from the definition and applicability of ballast water standards through to type approval of ballast water management systems. These FAQs were augmented and updated on the 5th April and are attached to this web page ( see file above ).
Members seeking an overview of US regulation of ballast water management can download a Powerpoint presentation which carries an accompanying audio commentary on regulation and compliance.
To view the entire resource page and its various materials click the following link: United States Coast Guard website - Ballast Water Management