WASHINGTON, Jan 7 (Reuters) - American Airlines (AAL.O) said Friday that more than 96% of its employees have submitted proof of COVID-19 vaccination or a request for an accommodation from the requirements. In November, the largest U.S. airline delayed the rollout of a mandate requiring its U.S.-based employees to be vaccinated against the coronavirus or to receive a religious or medical exemption until Jan. 4. American said Friday "anyone who isn"t vaccinated, including those with an approved accommodation, will be required to complete a weekly self-health declaration, practice social distancing when possible and wear a mask at all times, except when outside and social distancing can be maintained."