rules() public method

public rules ( )
 public function rules()
 {
     $rules = parent::rules();
     if ($this->isGatewayType(GATEWAY_TYPE_BANK_TRANSFER)) {
         $rules['authorize_ach'] = 'required';
     }
     return $rules;
 }
 public function rules()
 {
     $rules = parent::rules();
     if ($this->isGatewayType(GATEWAY_TYPE_BANK_TRANSFER)) {
         $rules = array_merge($rules, ['authorize_ach' => 'required', 'tos_agree' => 'required']);
     }
     return $rules;
 }