Social and environmental criteria are increasingly encouraged in public sector contracting. In the UK, The Public Services (Social Value) Act 2012 encourages public organising to apply social and environmental criteria in contract.
Reference:
LO 2, AC 2.1

Without further explanation, a schedule may be deemed to form an integral part of the obligations of either or both parties. Obviously, the scope or binding nature of such schedule depends on the way it is referred to in the obligatory language of the main agreement. Accordingly, merely attaching the general terms and conditions of sale without explaining to which part of the sale they apply or which provisions apply does not subject a sale pursuant to the body text of the agreement to those general terms and conditions.
Subcontracting is the practice of assigning, or outsourcing, part of the obligations and tasks under a contract to another party known as a subcontractor.
Reference:
- Schedules, annexes and exhibits
- CIPS study guide page 22-26
LO 1, AC 1.1

The license can be amended during its lifespan. However, in this case, it already has a clause allowing for mechanism of variation which sets out who can authorise changes and prohibits any oral variation. Therefore, the agreement between Rock's director and MWB credit controller is not an effective variation to the license.
Reference:
LO 1, AC 1.1

Developing new tender specifications should draw on:
* Current supplier experience (1);
* Alternative suppliers' input (3);
* Performance and usage data (4).Maintenance services (2) are unrelated to cleaning.
Reference: CIPS L4M3 Commercial Contracting - "Sources of data for contract specifications."

Ad-hoc purchase is the item bought for a single and non-recurring use or purpose.
A call-off contract, also known as a blanket order, is a purchase order which enables bulk orders over a period of time.
Operational procurement refers to the procurement of goods and services that are required to sustain an organization's day-to-day business operations.
Reference:
LO 1, AC 1.3