What is meant by "safe harbor" language?

a$.$ Producers have no obligations to notify customers of a data breach if fewer than $1,000$ customers are affected.

b$.$ Customers must be notified of a data breach only when protected information is released in an unencrypted form or$,$ even if encrypted, there is evidence the information was misused

c$.$ Producers are not required to notify regulators or customers of a data breach if the partner insurance company agrees to comply with data breach notification laws.

d$.$ Producers are not responsible for any damage that may result from a data breach if the customer has signed a hold harmless agreement.