If the allowed policy numbers is not a range (from 1 to X) then I would suggest creating a table for allowed numbers and using that in your query.
For example
Table AllowedPolicyNo
- 1
- 15
- 18...
And the query
select * from policy p
where p.policy_no in (select apn.policy_no from allowedpolicyno apn).
Or you can use a join if you prefer that