Since it's possible to increase a position in a subsequent capital call (with a new LPA), is it also possible for an LP to request to reduce their commitment? If so, are there specific requirements for them to do so? How do you deal with that?
Generally speaking, increasing or decreasing an LP's capital commitment post-admittance is accomplished via a simple change agreement countersigned by all parties (a new LPA is not required).
In the case of an increase, a "catch-up" capital call is usually sent. In the case of a decrease, it can only decrease to the amount the LP may have already paid-in. In summary, the requirements are that the requested decrease not go below any paid-in capital (or other measures may need to be discussed), and that the proper paperwork is put into place so that fund accounting can reflect this change appropriately.
In the case of an increase, a "catch-up" capital call is usually sent. In the case of a decrease, it can only decrease to the amount the LP may have already paid-in. In summary, the requirements are that the requested decrease not go below any paid-in capital (or other measures may need to be discussed), and that the proper paperwork is put into place so that fund accounting can reflect this change appropriately.