Final answer:
To verify the international rule that high-tech body swimsuits do not provide any buoyancy advantage, controlled testing of the suit's buoyancy can be performed, along with adhering to material specifications and conducting performance tests with swimmers.
Step-by-step explanation:
The rule that high-tech body swimsuits should not provide any buoyancy advantage can be verified through several methods. One approach could be conducting controlled testing where the suit is submerged in water to measure its buoyancy levels directly. The swimsuit would need to meet a specific standard that aligns with the human body's natural buoyancy. Manufacturers could also be required to adhere to certain material specifications and construction methods that are known not to enhance buoyancy when producing these swimsuits.
In addition to material and construction tests, performance tests with swimmers wearing the suits may be conducted. These tests could involve observing and recording the swimmers' performance in terms of speed and buoyancy when wearing the suit versus not wearing it. If the suits are indeed neutral in terms of buoyancy, the swimmers' performances should not show significant enhancement due to the suit itself.