PIP LETTER CONFUSION

My dad received a letter regarding his PIP benefit. He's been receiving the benefit for years now. He has a long-term disability that only has the capacity to get worse - the condition being ankylosing spondylitis - which mainly affects his reduced mobility.

The letter stated that there has been a change in PIP law. A change that affects how they decide PIP claims (no recent claim has been made). It went on to state that the change was related to how they consider the social support someone needs to mix with other people face to face.

The letter ended my stating that the recipient didn't need to anything - and that they won't do anything unless they hear from the recipient.

That was it.

Honestly, we found the letter vague and confusing.

Are you familiar with this letter? I'm guessing it's just automated to all, and would like to think it's nothing to worry about. But I'm just checking. When the letter stated that you don't need to do anything unless you think your claim can be affected, it's hard to know how to reply (if at all) since the letter didn't really explain good or bad what the change in the law was as such nor how it might affect someone's claim good or bad.