a. unless otherwise provided in an operating agreement, within ninety (90) days or such other period as is provided for in the operating agreement after the occurrence of the event that terminated the continued membership of the last remaining member, the personal representative of the last remaining member agrees in writing to continue the limited liability company and to the admission of the personal representative of the member or its nominee or designee to the limited liability company as a member, effective as of the occurrence of the event that terminated the continued membership of the last remaining member; provided, that an operating agreement may provide that the personal representative of the last remaining member shall be obligated to agree in writing to continue the limited liability company and to the admission of the personal representative of the member or its nominee or designee to the limited liability company as a member, effective as of the occurrence of the event that terminated the continued membership of the last remaining member, or

b. a member is admitted to the limited liability company in the manner provided for in the operating agreement, effective as of the occurrence of the event that terminated the continued membership of the last remaining member, within ninety (90) days or such other period as is provided for in the operating agreement after the occurrence of the event that terminated the continued membership of the last remaining member, pursuant to a provision of the operating agreement that specifically provides for the admission of a member to the limited liability company after there is no longer a remaining member of the limited liability company; or