In Brussels you can add your disabled card in the 4411 app to reserve a reserved parking space for disabled people. This way you enjoy the local disabled rate.
In Namur you can start a parking session on your disabled card. This is only possible via SMS.
To start a session just SMS: PMR *space* the parking zone *space* your number plate *space* your disabled card number. Eg: PMR NAM 1ABC123 card number.