With a Nuc the Queen can pretty much start laying as soon as she is installed. She has Combs, Pollen and stores of Honey or Syrup.
Some of the bees will be nurse bees, some foragers and guard bees. There may be one or 2 drones but they are not really needed.
Nurse bees can graduate to foragers if there is no brood but bees reverting back to nurse bees have a bit harder time of it due to the changes in hormones as the mature.
Packaged Bees need to build combs and plenty of honey or syrup is needed and the Queen will only lay if there is Pollen coming in which is needed to fee the brood on bee bread.
THE WISDOM OF THE HIVE - The Social Physiology of Honey Bee Colonies
THOMAS D. SEELEY
http://almus.net/docs/Pcheli/English/The%20Wisdom%20of%20the%20Hive%20-%20The%20Social%20Physiology%20of%20Honey%20Bee%20Colonies.pdf
“2.2. Worker Life History” page 28…
“During the first few days of adult life, a
worker functions primarily as a cell cleaner, cleaning and polishing
recently vacated brood cells. She also devotes time to eating some of
the pollen that is stored nearby, which favors the rapid activation
of her hypopharyngeal glands. The worker also spends some 20% of
her time resting—standing motionless on the combs or in a cell—
and another 20% patrolling—walking about the combs, as if searching
for work. By the time she reaches 3 days of age, she functions as a nurse, for her hypopharyngeal glands have begun secreting brood
food and she has started spending much time feeding the brood. She
also performs the other tasks that arise within the broodnest,
including tending the queen, capping brood, and grooming and
feeding nestmates. This pattern continues for the next 10 days or
so, or until she is about 12 days old. At this point she leaves the central
broodnest to work primarily in the peripheral, food-storage
region of the hive. Here she functions mainly as a food storer. Her hypopharyngeal glands are secreting the enzymes needed for producing
honey, and her poison gland has filled the venom sac. Shuttling
between the hive entrance and the upper honeycombs, she
receives nectar from the returning nectar foragers, converts it to
honey, and deposits this in the storage cells. She also packs pollen in
cells, ventilates the hive by fanning her wings, helps guard the hive
entrance, and continues grooming and feeding her hivemates. Also, if additional comb is needed for honey storage, these middle-aged
bees will activate their wax glands and build comb. Finally, from the
age of about 20 days until the end of life, a worker toils outside the
hive as a forager, gathering nectar, pollen, water, resin, or some combination
of these substances.”
“It must be stressed
that the activities of workers are adjusted in accordance with the
needs of their colony, and that these needs can vary greatly depending
on the conditions both inside and outside the hive. Indeed, it is
probably possible for bees of almost any age to perform a particular
task if the occasion demands it, as has been recently discussed in detail
by Robinson (1992).”