Gachagua is expected to provide a way forward for his supporters who are in limbo.
During his alleged abduction, his wife is reported to have sustained injuries.
The EU has flagged several Kenyan exports in recent months.
People's Liberation Party (PLP) leader Martha Karua has brushed off comments by Tanzanian lawmakers who called for her punishment over alleged interference with
PAYE tax affects over 15 million Kenyans.
More holes are being poked in the Juja MP's alleged disappearance.
Kenya seeks to be among the countries in Africa selling the cheapest phones.
Juja MP Koimburi was found dumped at the Coffee Plantation in Kibichoi, Kiambu County on May 26.
The prolonged disruption will affect both digital and physical systems.
The event will be held on Wednesday at Safari Park Hotel in Nairobi.