Existing law requires the attorney for the plaintiff or cross-complainant in any action arising out of the professional negligence of an architect, professional engineer, or land surveyor to file and serve a certificate declaring either that the attorney has consulted and received an opinion that the action is reasonable and meritorious from an architect, professional engineer, or land surveyor, licensed to practice in this state or in any other state, or that the attorney was unable to obtain that consultation for specified reasons. This bill would expand the malpractice complaints covered by the provision to include those against landscape architects and geologists or geophysicists. This bill would limit the practitioners that may be consulted to those who are licensed in this state. The bill would specify that these provisions only apply to actions filed on or after January 1, 2027.