Immediately before each payment and before each decision that depends on a published term, and again if the sponsoring company proposes a transfer. Government terms can change, and a figure read months earlier is not evidence of what applies today.
Re-verify at every point where money or commitment moves
Three moments call for a fresh reading. Before the processing fee is paid, because that payment is nonrefundable. Before the gift is made following successful vetting, because it is the largest and least recoverable commitment in the sequence.
And before any transfer, because the transfer fee and the new DHS background check make that step consequential for the individual rather than routine for the company. Between those moments, changes to a public page are worth noting but rarely require action on their own. What does require attention is official correspondence about the case itself, which is not replaced by anything published generally.
Viktor should also avoid tying business commitments, contracts or family arrangements to an assumed processing timetable, since nothing in the framework guarantees when a stage will conclude.