Air iOS - developer or ad-hoc certificate?

Hi,

I would like to create a P12 certificate to publish my AIR iOS app for a beta test.

This is from the Adobe docs:

You can now generate a valid P12 file, based on the key and the PEM version of the iPhone developer certificate:

openssl pkcs12 -export -inkey mykey.key -in developer_identity.pem -out iphone_dev.p12

Does it needs to be a developer certificate or is an ad-hoc certifcate working too?

Thanks