Any county interested in the paternity and/or support of a dependent child may institute civil or criminal proceedings against the responsible parent of the child, or may take up and pursue any paternity and/or support action commenced by the mother, custodian or guardian of the child. Such action shall be undertaken by the designated representative in the county where the mother of the child resides or is found, in the county where the father resides or is found, or in the county where the child resides or is found. Any legal proceeding instituted under this section may be based upon information or belief. The parent of the child may be subpoenaed for testimony at the trial of the action to establish the paternity of and/or to obtain support for the child either instituted or taken up by the designated representative of the county commissioners. The husband-wife privilege shall not be grounds for excusing the mother or father from testifying at the trial nor shall said privilege be grounds for the exclusion of confidential communications between husband and wife. If a parent called for examination declines to answer upon the grounds that his testimony may tend to incriminate him, the court may require him to answer in which event he shall not thereafter be prosecuted for any criminal act involved in the conception of the child whose paternity is in issue and/or for whom support is sought, except for perjury committed in this testimony. (1975, c. 827, s. 1; 1977, 2nd Sess., c. 1186, s. 4; 1985, c. 410.)