I essentially means that the oscilloscope input impedance must be according to 2). Probe compensation is possible for an input capacitance in the said range. The oscilloscope input must be 1 Mohm type, 10:1 setting is only a matter of scaling the display units correctly. 3) is the probe input impedance.
The 9Meg R in the probe is used with the trim cap to match the cable capacitance and input capacitance of scope with 1M to get a 1/(1+9) attenuation or 1/10th the signal with a flatter response from 10 to 100MHz.