Maybe The RN # can shorten information on the FTC tag but the CPSIA label needs at least to be that John and Jane Q Public can readily read answers to these questions -
* What entity is to be marked or ascertainable?
Section 103(a) requires that the name of the manufacturer or the name of the private labeler be ascertainable from the marking.
* What is the location of production to be marked or ascertainable?
The Commission believes that the name of the country and the city and state (or administrative region, as appropriate) where the product was manufactured would be sufficient to provide the location of production. However, the manufacturer would be responsible for identifying the specific source of the product in the event of a compliance inquiry or other Commission action.
* What date of production is to be marked or ascertainable?
The Commission recognizes that products may not always be started and completed in a single day. The Commission anticipates that the date of production could be a date range if the product is made over a period of time.
When the product is a group of disparate components or items assembled together or gathered into one package, the Commission interprets the date of manufacture to mean the date of assembly or placement into one package.
* What cohort information is to be marked or ascertainable? Do small volume manufacturers or crafters need to create a system that includes batch, run or other numbers?
Although Section 103(a) does not require manufacturers that do not use lot, batch or run numbers to create such a system, the Commission believes that compliance with this Section generally will require that manufacturers have in place a reasonable means to ascertain detailed production information, including the means to distinguish products made from different factories, made with different components, at different times or have other material differences that make the product non-identical from previous products. The business and recordkeeping practices of peer manufacturers should be considered. Small volume manufacturers and crafters may be unlikely to use lot, batch or run numbers, and, again, the Commission does not interpret Section 103(a) to require them to create such a system. Nevertheless, reasonable practices should be in place by such manufacturers to keep records of components used in their products.
From
http://www.cpsc.gov/about/cpsia/sect103policy.pdf