Delete the rules “The Quarry” and “Builder’s Exchange.” Delete the list items for Carpenter, Decorator, and Logistician from the rule “Specialisation.” Delete from the rule “The Building” the bullet point that begins “If they do so, and the Material has the Supportive Property…” Rewrite the rule “Building Contents” as follows:

The possible building contents for The Building, known as Materials, are listed in the table below. The ruleset may refer to a given Material using either its Name or Abbreviated Name - they are considered equivalent. The Description is flavour text. Each Material may have Properties, as determined by the table below.

{| class="wikitable"
|-
! Name || Abbreviated Name || Description || Properties
|-
| Empty || _ || This represents open space. ||
|-
| Wood || W || A reliable building material. ||
|}

A Block may have the condition of Weakened, defaulting to not Weakened. A Block that is Weakened is tracked by formatting the Abbreviated Name of its Material in italics. Empty Blocks are always not Weakened.

Rewrite the last item in the list from the rule “Specialisation” as follows:

* Supervisor: Either change one non-Weakened Block in the Building to Weakened, or change one Weakened Block in the Building to non-Weakened

Delete from the rule “The Building” the step of the Move On action that begins with “If the Quarry has at least…”

If there are any Engineers who had the Specialisations Carpenter, Decorator, Logistician, or Stonemason before this proposal was enacted, change each of their Specialisations to Supervisor. If there are any Stone or Rebar Blocks in the Building, change those Blocks to Wood.