(section: 3 / paragraph: b / sub-paragraph: vi. / line: 1)
Diseases are restricted to the ones listed in the rules.
(section: 3 / paragraph: c / line: 6)
Yes, it is okay to use a purchased multimeter as part of the device the students build provided that none of the components were manufactured to measure water quality/chemistry. They need to be able to explain how they built it.
(section: 2 / paragraph: 1 / sub-paragraph: 1 / line: 1)