Public companies are encouraged to deliver clearer and more robust disclosure. It also stipulates new rules for insider trading while a hack is being investigated before it's publicly disclosed;
The guidance also said company executives must not trade in a firm’s securities while possessing nonpublic information on cyber security attacks. The SEC encouraged companies to consider adopting specific policies restricting executive trading in shares while a hack is being investigated and before it is disclosed.More at Reuters.
It discourages companies from withholding disclosure simply because of an ongoing investigation into a cyber security matter.