ST the rule for public transport is that you can be captain up to 65 for multi-pilot ops, provided the other pilot is less than 60. For single pilot ops its 60 but that is not relevant for SAR. I can't see the company being able to put any other upper age limit on it, that would be discrimination on the grounds of age - illegal. However I suppose if you were 64 they would probably try to wriggle out of giving you a type rating, which is not unreasonable law notwithstanding.