It means to summon or prorogue the Provincial Assembly for some specific business.

To make different bills and ordinances for specific purposes and to put it forward to the Provincial Assembly and also to take consent of the Chief Minister or of the Governor.

For such purpose summaries are prepared and forwarded through the specified channel.
Basically it is the business/work of legislation section to prepare all such according to legal shape but so far as the official correspondence is concerned it is related to Provincial Assembly.