Most bills passed during the 2009 legislative session went into effect upon approval or on July 1, 2009. A few, though, are slated to go into effect on January 1, 2010, such as:
HB981 Ignition Interlock. Makes amendments to Hawaii Revised Statutes and Act 171, Session Laws of Hawaii 2008, reflecting recommendations of ignition interlock implementation task force. (HB981 CD1)
HB1512 Pet Protection. Authorizes family court to authorize the issuance of a temporary restraining order in certain circumstances involving an animal identified to the court as belonging to a household. Effective 1/1/10. (HB1512 CD1)
This is not an exhaustive list. Let us know if you're aware of others.