Bootstrap formvalidation.io trying to require one field or the other

You can disable the second validation and make it enabled only when the first is wrong :

take a look at this link

<form id="profileForm" method="post">
    <p>Please provide one of these information:</p>

    <div class="form-group">
        <label class="control-label">Social Security Number</label>
        <input type="text" class="form-control" name="ssn" />
    </div>

    <div class="form-group text-center">&mdash; Or &mdash;</div>

    <div class="form-group">
        <label class="control-label">Driver's License Number</label>
        <input type="text" class="form-control" name="driverLicense" />
    </div>

    <div class="form-group">
        <button type="submit" class="btn btn-default">Submit</button>
    </div>
</form>

<script>
$(document).ready(function() {
    $('#profileForm')
        .formValidation({
            framework: 'bootstrap',
            icon: {
                valid: 'glyphicon glyphicon-ok',
                invalid: 'glyphicon glyphicon-remove',
                validating: 'glyphicon glyphicon-refresh'
            },
            fields: {
                ssn: {
                    validators: {
                        notEmpty: {
                            message: 'Please provide the Social Security number'
                        },
                        regexp: {
                            regexp: /^(?!(000|666|9))\d{3}(?!00)\d{2}(?!0000)\d{4}$/,
                            message: 'The format of your SSN is invalid. It should be XXXXXXXXX with no dashes'
                        }
                    }
                },
                driverLicense: {
                    // Disable validators
                    enabled: false,
                    validators: {
                        notEmpty: {
                            message: 'Or the Drivers License number'
                        },
                        stringLength: {
                            min: 8,
                            max: 20,
                            message: 'The Drivers License number must be more than 8 and less than 20 characters long'
                        }
                    }
                }
            }
        })
        .on('keyup', '[name="ssn"], [name="driverLicense"]', function(e) {
            var driverLicense = $('#profileForm').find('[name="driverLicense"]').val(),
                ssn           = $('#profileForm').find('[name="ssn"]').val(),
                fv            = $('#profileForm').data('formValidation');

            switch ($(this).attr('name')) {
                // User is focusing the ssn field
                case 'ssn':
                    fv.enableFieldValidators('driverLicense', ssn === '').revalidateField('driverLicense');

                    if (ssn && fv.getOptions('ssn', null, 'enabled') === false) {
                        fv.enableFieldValidators('ssn', true).revalidateField('ssn');
                    } else if (ssn === '' && driverLicense !== '') {
                        fv.enableFieldValidators('ssn', false).revalidateField('ssn');
                    }
                    break;

                // User is focusing the drivers license field
                case 'driverLicense':
                    if (driverLicense === '') {
                        fv.enableFieldValidators('ssn', true).revalidateField('ssn');
                    } else if (ssn === '') {
                        fv.enableFieldValidators('ssn', false).revalidateField('ssn');
                    }

                    if (driverLicense && ssn === '' && fv.getOptions('driverLicense', null, 'enabled') === false) {
                        fv.enableFieldValidators('driverLicense', true).revalidateField('driverLicense');
                    }
                    break;

                default:
                    break;
            }
        });
});
</script>