.  The technical guidance manual sets out the requirements for the Code, and the process by which a Code assessment is reached. It aims to make the system of gaining a Code assessment as simple, transparent and rigorous as possible, a process that inspires confidence in Code assessors, home builders, product manufacturers and, crucially, consumers.  The technical guidance manual sets out the requirements for the Code, and the process by which a Code assessment is reached. It aims to make the system of gaining a Code assessment as simple, transparent and rigorous as possible, a process that inspires confidence in Code assessors, home builders, product manufacturers and, crucially, consumers.  