Laravel Form Request validation issues - laravel-5

Question

I'm attempting to create a single error response message for array input:
This is my form:
<div class="form-group col-md-12">
<div class="row">
<div class="col-md-6">
<label for="client-type">Client Type</label>
<input type="text" name="client_type[]" class="form-control" value="Panelist" readonly>
</div>
<div class="col-md-6">
<label for="commission-percentage">Commission Percentage</label>
<input type="number" name="commission_percentage[]" class="form-control">
</div>
</div><br>
<div class="row">
<div class="col-md-6">
<label for="client-type">Client Type</label>
<input type="text" name="client_type[]" class="form-control" value="Non Panelist" readonly>
</div>
<div class="col-md-6">
<label for="commission-percentage">Commission Percentage</label>
<input type="number" name="commission_percentage[]" class="form-control">
</div>
</div>
Here's my controller:
public function store(StoreCommissionsList $request)
{
$attributes = $request->validated();
dd($attributes);
}
And finally my StoreCommissionsList form request:
public function rules()
{
$commission = request('commission_percentage');
$rules = [];
$rules['role_id'] = 'required';
$rules['client_type'] = 'required';
if ( $commission[0] == null && $commission[1] == null )
{
$rules['commission_percentage'] = 'required';
}
return $rules;
}
public function messages()
{
return [
'role_id.required' => 'Please select a user role',
'client_type.required' => 'Please input a client type',
'commission_percentage.required' => 'Please fill in a percentage commission for each client type',
];
}
What is happening is: If all the fields in my form are blank, only the role_id seems to be passing the validation check in terms of returning the required validation message. The commission_percentage is not validated at all and after inputting role_id, the form submits meaning the commission_percentage validation is overlooked for some reason.
Kindly assist.
Update
Here's my implementation using the wildcard (*) dot-notation.
public function rules()
{
$rules = [];
$rules['role_id'] = 'required';
$rules['client_type.*'] = 'required';
$rules['commission_percentage.*'] = 'required';
return $rules;
}
For this, the validation error messages will be duplicated for each array item in the request, in my case, something like this:
The commission_percentage.0 field is required.
The commission_percentage.1 field is required
So the earlier implementation in my rules was a possible solution for this duplicate issue.