Is it common to repeat warranties at all times between signing and closing?
Frequency/market practice: Fairly common.
What is the applicable repetition standard, e.g., true in all material respects or Material Adverse Effect?
Frequency/market practice: True and accurate in all material aspects as of the date of signing and as of the closing date. However, essential representations are typically made without a materiality qualifier.
Is double materiality common (a materiality qualification in bring-down at closing and in representation(s))?
Frequency/market practice: Rarely; double materiality presents not only design issues to avoid redundancies but its potential to lengthen discussions with respect to the structure of transactions during negotiations.