Back in the early days of PBX sales, manufacturers sold boxes with RTU's (rights to use) licenses. If you bought the license, you could use the feature. If you SOLD the PBX, the RTU's had to be purchased again. It wasn't illegal then, and it's not illegal now.
In the US, a Panasonic dealer is licensed to sell the product and install it. An end user is not. It may be a stupid rule, but it's still the rules.
LkEErie