No Work on Child Dependant BRP

I have Recived the Biomatrict Residence permits for my wife and two children for their FLR (M) extensions.On the children’s Biomatric residence permit it is mentioned No Work No engaging In Business The children leave is leave to remain as Dependent. On their Old BRPs it was mentioned allowed to Work. I just wanted to check is it alright on their new BRP that it is mentioned NO work is it normal or do i need to contact the home office to change it.The kids are 15 years and 14 years of age.

Section D-LTRC: Decision on application for leave to remain as a child doesn’t appear to have any work restrictions.