plz i have some rules function that i dont want to change in its code (BaseModel from database)
and i make other rules function in the model , i want to change in it

the base one "dont ant to change"

```
public function rules() {
        return array(
            array('start_date, end_date, info, type_id', 'required'),

            array('start_date, end_date, type_id', 'length', 'max'=>10),

    }

```

and i want to change in other function in the model that inherit from the base model
here is its code

```
public function rules()
    {
        $rules = array(
                    array('start_date, end_date, type_id', 'length', 'max'=>16),
        );
        return array_merge($rules,parent::rules());

    }

```

the problem that it uses max value as 10 , not 16
i want it 16
even when i chenge last line to

```
    return array_merge(parent::rules(),$rules);

```