As long as she is under the age of "ya`s" or shar'i menopause, then she must observe 'iddah, which for her is not three menstrual cycles, but rather three full months.
In fiqh, a woman who is in the age of menstruating, but does not menstruate, she is referred to as mustarabah. Of course, it would be a good idea for her to refer to the specific view of her Marja' taqleed.
The 'iddah period for an Islamic divorce is 3 menstrual cycles, or 3 months if a woman is within the age of menstrual cycle but does not menstruate, or delivery of a child if she is pregnant.
The 'iddah takes effect and commences when the shar'i divorce is conducted. If the court divorce is also an Islamic shar'i court, then it would have that effect as well.
However, if it is a civil/legal divorce, and not a shar'i divorce, she is still Islamically married to her husband and they must initiate procedure of Islamic divorce for her to commence her 'iddah.
Iddah of Talaq (Waiting period after Talaq) is Must on her no matter how long she is separated from her husband as far as the marriage was consummated. Iddah starts immediately from the time of Talaq and it goes on for three periods of menstruation.
If marriage was never consummated, and Talaq was declared, then there will be no Iddah.
Intimate acts which do not include sexual intercourse do not mean that the marriage has been consummated. Marriage is consummated when sexual intercourse takes place. If there was no sexual intercourse, there will be no Iddah after divorce. Obviously you will then be entitled of half of the agreed Mahr, while if marriage was consummated, you will be entitled to the full Mahr.
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