Since 1979, pursuant to Rule 1:39, there has existed in New Jersey a program for specialty certification of attorneys. At present, certification for qualified persons is available for civil trial attorneys, criminal trial attorneys, matrimonial law attorneys, workers compensation law attorneys or municipal court trial attorneys. Persons in those areas qualified under the rules may be designated as certified attorneys and may receive a case referral "from a lawyer who is not a partner in or associate of that attorney's law firm or law office [and] may divide a fee for legal services with the referring attorney or the referring attorney's estate… ." In this age of specialization, the certification program referred to herein has proved useful and has been widely successful. Rule 1:39-1, et al. sets forth the regulations controlling the certification program and the requirements and criteria for attorneys to become certified in the foregoing fields.