How is the "required" attribute dynamically set on a MultiWidget?

Question

There are 4x TextInput elements that comprise a MultiWidget. Only the first TextInput requires the required attribute. Yet required is being set on all four elements.

Form.use_required_attribute is not suitable for my case due it's binary nature; either values for all form fields are required or not. I've set required=False to every possible place where it's potentially warranted, but I'm still not getting the desired result.

How can I get just the first TextInput set to required?

class MultiTagWidget(MultiWidget):

    def __init__(self, *args, **kwargs):
        widgets = [TextInput(attrs=kwargs['attrs']) for i in range(4)]
        super().__init__(widgets, *args, **kwargs)

    def decompress(self, value):
        if value:
            return value.split("_")
        return ""




class TagField(MultiValueField):

    def __init__(self, *args, **kwargs):
        fields = []
        for i in range(4):
            field = CharField(**{
                "min_length": 1, "max_length": 25, "validators":[
                    RegexValidator("[<>`':;,.\"]", inverse_match=True)
                ]
            })
            if i == 0:
                field.error_messages = {
                    'incomplete': "Provide at least 1 tag for your question"
                }
                field.required = True
            else:
                field.required = False
            fields.append(field)
        super().__init__(fields, *args, **kwargs)

        def compress(self, data_list):
            data_list = "_".join(list(set([tag.lower().strip() for tag in data_list])))
            return data_list

    tags = TagField(
        widget=MultiTagWidget(
            attrs={"required": False}
        ), require_all_fields=False,
        help_text="Add up to 4 tags for your question"
    )