The recertification policy is such that IBCLCs can recertify early by one year by taking, and successfully passing, the exam. Please note that if you choose to recertify one year early in this manner, then your expiration date will be five years from when you passed the exam (e.g. If you are due to recertify in 2019, but you pass an exam in 2018, then your next expiration date will be 2023 and not 2024). If you are denied or fail the April or September examination, your certification will expire on June 30th or December 31st of that year respectively.
IBCLCs are not able to recertify by CERPs one year early.