Rule 502 permits advertising as long as it is not false, misleading, or deceptive. The advertising expressly states two facts: 14 of 36 of the largest community banks are audited by their firm and second, the average audit fee, as a percentage of total assets, is lower than any of the other CPA firms in the city. Contel must be able to support those factual statements. Assuming he can, there is no violation. However, it may be difficult to support the comparison to the fees of other firms.