In the absence of an applicable determination issued by the Department of Health and Human Services that requiring the documentation specified in paragraphs (b) or (c) of this section is not in the public interest, as a condition for issuing the travel credits or vouchers in § 262.4, carriers may require, as appropriate, documentation specified in paragraphs (a) to (c) of this section.

(a) For any consumer requesting a travel credit or voucher because of a government restriction or prohibition pursuant to § 262.4(a), carriers may require the consumer to provide the applicable current government order or other document demonstrating how the government order prohibits the consumer from travel to, from, or within the United States as scheduled or requires the consumer to quarantine for more than 50% of the length of the consumer's scheduled trip at the destination (excluding travel dates) as shown on the passenger's itinerary.

(b) For any consumer requesting a travel credit or voucher to protect his or her health pursuant to § 262.4(b), carriers may require the consumer to provide a valid medical certificate as set forth in paragraphs (b)(1) and (b)(2) of this section.

(1) For purposes of paragraph (b) of this section, a medical certificate means a written statement from a licensed treating medical professional stating that it is his/her professional opinion, based on the medical condition of the individual and current medical knowledge on the relevant serious communicable disease, including public health guidance issued by CDC or WHO, if available, that the individual should not travel during the current public health emergency by commercial air transportation to protect his or her health from a serious communicable disease.

(2) To be valid, a medical certificate under paragraph (b) of this section must be dated after the declaration of the relevant public health emergency and no earlier than one year before the scheduled travel date and include information regarding the licensed treating medical professional's license (the date of issuance, type of the license, State or other jurisdiction in which the license was issued).

(c) For any consumer requesting a travel credit or a voucher to protect the health of others pursuant to § 262.4(c), carriers may require the consumer to provide a valid medical certificate as set forth in paragraphs (c)(1) through (c)(3) of this section. For any consumer who informed carriers that there is not adequate time to obtain and submit a valid medical certificate as set forth in paragraphs (c)(1) through (c)(3) of this section before the scheduled travel date, carriers must allow submission of the medical certificate within a reasonable time after the scheduled travel date.

(1) For purposes of paragraph (c) of this section, a medical certificate means a written statement from a licensed treating medical professional stating that it is his/her professional opinion, based on the medical condition of the individual and current medical knowledge of the relevant serious communicable disease, including public health guidance issued by CDC or WHO, if available, that the individual should not travel by commercial air transportation on the date of the scheduled travel to protect the health of others from a serious communicable disease because the individual has or is likely to have contracted a serious communicable disease .

(2) To be valid, a medical certificate under paragraph (c) of this section must include information regarding the licensed treating medical professional's license (the date of issuance, type of the license, State or other jurisdiction in which license was issued).

(3) For a medical certificate under paragraph (c) of this section, carriers may require that it be dated close to the travel date, as determined based on the current medical knowledge and applicable public health guidance issued by CDC or WHO regarding the contagious period of the relevant serious communicable disease.