A perpetual calendar device as set forth which continually maintains a display of the present month and day as well as the minimum birth year for an individual who is entitled to purchase alcohol or tobacco products. for a dual-plane complementary metal oxide semiconductor. The operable ramp further includes an outer ramp rotatably coupled to a second end of the inner ramp about a second axis. The cross-linking reaction between the proteins in the latex sap and the aldehyde can take place in the solution used to the final product, or after the final latex product has been formed, or during various intermediate steps of the processes for forming the latex products. For each post operation identifier, a post operation instance is created and executed.