The three labels that are required when designing the chart of account structure for this project are Primary Balancing, Cost center, and Natural Account. A chart of account structure is composed of segments that represent different dimensions of accounting information, such as company, department, account, or project.
Each segment has a label that indicates its function or purpose within the chart of accounts. The Primary Balancing label is required for the segment that identifies the legal entity or business unit for which financial statements are prepared and balanced. The Cost center label is required for the segment that identifies the organizational unit or function that incurs expenses or generates revenues. The Natural Account label is required for the segment that identifies the nature of an account, such as asset, liability, revenue, or expense.
The Intercompany Segment label is not required when designing the chart of account structure for this project, as this is an optional label for the segment that identifies intercompany transactions between different legal entities or business units within the same enterprise. The Secondary Balancing label is not required when designing the chart of account structure for this project, as this is an optional label for the segment that identifies an additional balancing dimension other than the primary balancing segment, such as fund or region. Reference: Oracle Financials Cloud: General Ledger 2022 Implementation Professional Objectives - Define Chart of Accounts 12

To achieve the requirement of only single currency journals being entered for this company, you should enable "Limit a Journal to a Single Currency" on both ledger options and journal sources. Ledger options are settings that apply to a specific ledger, such as journal processing options, currency options, and average balance processing options. Journal sources are identifiers that indicate where a journal originated, such as manual entry, subledger accounting, or import. You can enable "Limit a Journal to a Single Currency" on both ledger options and journal sources using the Specify Ledger Options and Manage Journal Sources tasks in Setup and Maintenance. This will enforce single currency journals for journals entered on the Create Journal page and for journals that are imported. You do not need to enable "Limit a Journal to a Single Currency" on journal lookup codes, as these are codes that indicate the status of a journal, such as Entered, Posted, or Reversed. You do not need to enable "Limit a Journal to a Single Currency" on journal category, as this is an attribute that classifies journals by purpose or function, such as Purchase Invoices or Allocations.
You do not need to enable "Limit a Journal to a Single Currency" on profile option, as this is a setting that affects the behavior of an application or feature for a user or responsibility. Reference: Oracle Financials Cloud: General Ledger 2022 Implementation Professional Objectives - Define Ledgers 12

To add a global branding logo and more predefined transactional attributes to the journal approval email notification, you should copy (or customize) and edit the layout template and the data model. The layout template is a file that defines the appearance and content of the notification, such as text, images, tables, or charts. The data model is a file that defines the data sources and queries that provide data for the notification, such as predefined transactional attributes. You can copy (or customize) and edit the layout template and the data model using Oracle Analytics Publisher reports. You do not need to copy (or customize) and edit the output type, as this is a setting that determines the format of the notification output, such as HTML or PDF.
You do not need to copy (or customize) and edit the data source, as this is a component of the data model that specifies where data for the notification comes from, such as an SQL query or an XML file. You do not need to copy (or customize) and edit the sub template, as this is a file that contains reusable content or logic that can be referenced by multiple layout templates. Reference: Oracle Financials Cloud: General Ledger 2022 Implementation Professional Objectives - Configure Workflow Approvals and Notifications 12

The source is where you specify the amount to be allocated. You can use various sources, such as account balances, fixed amounts, or statistical balances. In this case, you want to use the statistical balance of the floor area as the source of the allocation. The basis is where you specify the driver or factor that determines how the source amount is distributed among the targets. The target is where you specify the destination accounts that receive the allocated amount. The offset is where you specify the account that records the opposite side of the allocation entry. The allocation range is where you specify the scope of the allocation, such as the ledger, balancing segment, or legal entity. References:
* Oracle Financials Cloud Implementing Enterprise Structures and General Ledger, Chapter 3:
Allocations and Periodic Entries, Allocation Components
* Oracle Financials Cloud Using General Ledger, Chapter 3: Allocations and Periodic Entries, Overview