Explanation/Reference: https://www.wolfsberg-principles.com/sites/default/files/wb/pdfs/The-Wolfsberg-Group.pdf

An automated transaction monitoring system is a tool that analyzes transactions and customer behavior for signs of money laundering or other financial crimes, and generates alerts when suspicious or unusual activity is detected. The system relies on a set of rules and parameters that define what constitutes normal and abnormal transactions, based on the risk profile and business nature of the financial institution or business.
These rules and parameters need to be periodically reviewed and updated to ensure that they are effective and compliant with the latest regulations and best practices.
One of the factors that would most likely result in a change in the monitoring system parameters is when the national Financial intelligence Unit (FIU) issues new risk indicators. The FIU is a central authority that collects, analyzes, and disseminates financial intelligence related to money laundering, terrorist financing, and other financial crimes. The FIU also provides guidance and feedback to financial institutions and businesses on how to comply with their anti-money laundering (AML) obligations and improve their transaction monitoring systems. The FIU may issue new risk indicators based on its analysis of emerging trends, typologies, and threats in the financial sector, or based on international standards and recommendations.
These risk indicators are intended to help financial institutions and businesses identify and report suspicious transactions more effectively and efficiently.
Therefore, when the FIU issues new risk indicators, the financial institution or business should review its existing monitoring system parameters and adjust them accordingly to reflect the new risks and scenarios. For example, the FIU may issue new risk indicators related to the use of cryptocurrencies, virtual assets, or online platforms for money laundering or terrorist financing. In that case, the financial institution or business should update its monitoring system parameters to include new rules, thresholds, or patterns that capture these activities and generate alerts for further investigation.
References:
* 1: The Complete Guide to Transaction Monitoring: Everything to Know
* 2: AML Scenarios: Transaction Monitoring Challenges
* 3: Setting AML Transaction Monitoring Thresholds
* 4: Automated Transaction Monitoring - Considerations for System Implementation
* 5: ACAMS (2020). CAMS Certification Package (6th Edition)

Enhanced due diligence (EDD) is a set of additional measures that must be applied by financial institutions (FIs) in higher-risk situations, such as when dealing with customers or transactions from high-risk third countries, customers who are politically exposed persons (PEPs), or customers who present a higher risk of money laundering or terrorist financing. EDD may include obtaining more information on the customer's identity, source of funds, source of wealth, business relationships, and purpose of the transaction, as well as conducting more frequent and intensive ongoing monitoring of the customer's activities.
However, EDD may be bypassed for certain situations where the risk of money laundering or terrorist financing is low, and where the customer is subject to adequate supervision and regulation in the EU or the US. According to the CAMS Study Guide - 6th Edition1, one such situation is when on-boarding a casino that is part of an international hotel chain, provides less than 50% of overall revenue and that fully complies with group-wide policies and procedures. This is because such a casino is likely to have a low risk profile, as it is not the main source of income for the hotel chain, and it adheres to the same standards and controls as the rest of the group. Therefore, EDD may not be necessary for this situation, and the FI may apply simplified due diligence (SDD) instead.
The other situations listed in the question are not eligible for bypassing EDD, as they involve higher-risk factors, such as dealing with customers or entities from high-risk third countries, customers with complex ownership structures, or customers who are PEPs. These situations require FIs to apply EDD measures to mitigate the risk of money laundering or terrorist financing.
References:
CAMS Study Guide - 6th Edition, Chapter 3, Section 3.4, page 84
White Paper on KYC - Enhanced Due-Diligence, page 2
Anti-money laundering - a guide to customer due diligence, page 3
Enhanced Due Diligence for High-risk Customers, page 1

Wash trading is the term for trading through multiple accounts, where an individual generates offsetting profits and losses and transfers of positions through accounts that do not appear to be commonly controlled. Wash trading is a form of market manipulation that creates artificial trading activity and volume, and may be used to evade taxes, inflate prices, or launder money. Wash trading can also involve the use of third parties or intermediaries to conceal the true identity and source of funds of the trader.
References: = The main references for this question are the following sources:
* The document titled "Money Laundering and Terrorist Financing Typologies and Trends in Canadian Securities Dealers" published by the Investment Industry Regulatory Organization of Canada (IIROC) in December 2019. You can access it by clicking here. This document states that "Wash trading is a form of market manipulation where an individual simultaneously sells and buys the same financial instruments to create misleading, artificial activity in the marketplace. Wash trading is illegal under securities law because it misleads investors and regulators about the true supply and demand of the securities involved. Wash trading can also be used to evade taxes, inflate prices, or launder money."
* The document titled "Market Manipulation" published by the Financial Industry Regulatory Authority (FINRA). You can access it by clicking here. This document states that "Wash sales are a form of market manipulation in which an investor simultaneously sells and buys the same security to create misleading, artificial activity in the marketplace. Wash sales are illegal under Section 9(a)(1)(A) of the Securities Exchange Act of 1934. Wash sales can be used to manipulate the price of a security, evade taxes, or launder money."