The fine distinction is between an individual’s duty and a communal determination. Quduri requires the observer to fast personally, while a public determination must satisfy the rules for accepting testimony.
The next clause accordingly tests whether the sky was obstructed or clear; neither rule can be substituted for the other.
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Kitab al-Sawm: Crescent Sighting and Establishing Ramadan
The fine distinction is between an individual’s duty and a communal determination. Quduri requires the observer to fast personally, while a public determination must satisfy the rules for accepting testimony.
The next clause accordingly tests whether the sky was obstructed or clear; neither rule can be substituted for the other.