Help with preconditions for audit.

No, this is separate from general acceptance of a new audit client (ethics etc). However,

ISA 210 states:

In order to establish whether the preconditions for an audit are present, the auditor shall:

(a) Determine whether the financial reporting framework to be applied in
the preparation of the financial statements is acceptable; and

(b) Obtain the agreement of management that it acknowledges and
understands its responsibility:

(i) For the preparation of the financial statements in accordance
with the applicable financial reporting framework, including
where relevant their fair presentation; (Ref: Para. A15)
(ii) For such internal control as management determines is necessary
to enable the preparation of financial statements that are free
from material misstatement, whether due to fraud or error; and
(iii) To provide the auditor with:
a. Access to all information of which management is aware
that is relevant to the preparation of the financial statements
such as records, documentation and other matters;
b. Additional information that the auditor may request from
management for the purpose of the audit; and
c. Unrestricted access to persons within the entity from whom
the auditor determines it necessary to obtain audit evidence.

Generally, this will be covered in the engagement letter.