def set_input_score_start_range(self, score):
        """Sets the input score start range.

        arg:    score (decimal): the new start range
        raise:  InvalidArgument - ``score`` is invalid
        raise:  NoAccess - ``range`` cannot be modified
        *compliance: mandatory -- This method must be implemented.*

        """
        # Implemented from template for osid.grading.GradeSystemForm.set_lowest_numeric_score
        if self.get_input_score_start_range_metadata().is_read_only():
            raise errors.NoAccess()
        try:
            score = float(score)
        except ValueError:
            raise errors.InvalidArgument()
        if not self._is_valid_decimal(score, self.get_input_score_start_range_metadata()):
            raise errors.InvalidArgument()
        self._my_map['inputScoreStartRange'] = score