I have an international (JFK-HEL-SVO) partner (AY) award. If I no-show for it,

(1) can I change it to a future date with no fee as long as it is the same routing and within ticket validity (365 from issuance)?

(2) can I pay the $150 reinstatement fee and get the miles back as long as I request reinstatement within ticket validity (365 from issuance)?

or is the ticket validity not 365 from issuance, but actually through day of departure?

Thanks!