No provision of this chapter is intended, nor shall it be construed or applied, to authorize a public body to withhold a public record in its entirety on the grounds that some portion of the public record is excluded from disclosure by this chapter or by any other provision of law. A public record may be withheld from disclosure in its entirety only to the extent that an exclusion from disclosure under this chapter or other provision of law applies to the entire content of the public record. Otherwise, only those portions of the public record containing information subject to an exclusion under this chapter or other provision of law may be withheld, and all portions of the public record that are not so excluded shall be disclosed.