Philips 40PFL8664H User Manual page 101

3.4.3 Age rating
Some digital broadcasters, depending on your country,
have their programmes rated.
When the rating is equal or higher than the rating you have
set for your child's age, the programme will be blocked.
To set an age rating, press h > Setup > Features > Child
lock and select Parental rating.
With Parental rating selected in Child lock go to h > Setup
> Features > Parental rating and select the age rating for
programmes that are allowed to be viewed.
A programme with an equal or higher age rating will be
blocked and the TV will ask for the code to unblock the
programme. Some operators only block programmes with
a higher rating.
Age rating is activated the moment you close the onscreen
menu or set the TV to standby.
Read More on ... > Timers and locks > Child lock.