Old Encoders

Are teams allowed to use the old style encoders, the ones that only have one wire out of them? I read the rules over again and it is not really clear about older/upgraded vex parts.

Thanks
~DK

Yes, they are legal for competition. The only VEX parts specifically excluded in the rules are electrical parts from the VEXplorer product line:

I looked for, but could not find, any restriction on the use of discontinued products.

I looked at the same place. Just wanted to make sure. Thanks