WASHINGTON - The international community is looking for signs of progress on key issues ahead of an international conference on Afghanistan in Brussels next week, said Ambassador Richard Olson, the US special representative for Afghanistan and Pakistan.

The European Union and the National Unity government of Afghanistan will co-host the Brussels Conference on Afghanistan starting Tuesday. Representatives from more than 70 countries and dozens of international organisations and agencies are expected to attend.

After nearly 15 years of war and billions of dollars in international aid, the Afghan government still needs international support. But Olson said that support should not be taken for granted.

“US and international support for Afghanistan is not a blank cheque. Our support is conditioned and conditional on Afghan progress,” said Olson at an event organised by the Paul H. Nitze School of Advanced International Studies at John Hopkins University. “Our collective ability to continue providing significant levels of support to Afghanistan is dependent on the Afghan government’s performance and ability to work with us as an effective partner.”

Olson told VOA there are four areas of concern in the international community. “First of all, further commitments on anti-corruption, electoral reforms, reforms on fiscal sustainability and on human rights, including rights of women,” he said.

Meanwhile, Afghanistan's president will meet world powers at the conference in Brussels in a bid to secure financial aid from the international community up to 2020 to rebuild the war-ravaged nation.

The meeting on October 4 and 5 will try to drum up support from an international community suffering from aid fatigue as it grapples with conflicts in Syria and Iraq plus the worst migration crisis since World War II.

US Secretary of State John Kerry and UN Secretary General Ban Ki-moon are among those who will join hosts Afghan President Ashraf Ghani and EU President Donald Tusk.

Financial support is "crucial" in order "to bring about a new strategic shift towards stabilisation and possibly peace" in Afghanistan, despite the country not having "been in the headlines for many years", officials said ahead of the conference.

"Nobody can afford for Afghanistan to destabilise again," a senior EU official added.

More than 70 countries and 25 international organisations will attend the event, which comes just before the 15th anniversary of the US-led invasion of Afghanistan after the 9/11 attacks.

Afghanistan is still struggling to negotiate peace with the Taliban and other militant groups who continue to wage a bloody insurgency.

The Brussels conference follows up from a meeting in Tokyo in 2012 where the international community agreed to provide four billion euros a year in funding until the end of 2016.

It also comes two years after the London Conference on Afghanistan at which then newly-elected president Ashraf Ghani vowed to build a more self-reliant Afghanistan. Ghani said last week in Kabul that "in Brussels, your government will represent all of you women, men, all of you. In Brussels the world is going to reiterate their economic commitments again".

He added: "We are taking Brussels very seriously. After we return from Brussels we have to work together, this is the importance of it."

The international community will make pledges for the next four years but officials would not be drawn on the level of funding in comparison to the four billion euros a year agreed in Tokyo.

"The pledging exercise remains a difficult one and very fluid until the last moments," one EU official said. "The three billion mark is passed, but we don't know where we'll end up."

The EU itself will sign a state building contract of 200 million euros for 2017-2018 at the conference, honouring its commitment to an annual budget for that amount for Afghanistan.

But payouts will depend on whether Afghanistan meets its political and financial reform commitments, as well as political transparency.

The conference comes after NATO countries agreed at a summit in Warsaw in July to maintain troop numbers in Afghanistan and uphold a pledge of $5 billion a year for local security forces for the next four years.

EU officials expressed some optimism about Afghanistan's human development. Under the country's new unity government, "the speed of reforms has significantly increased when compared to previous administrations", said an EU official.

"The Afghan government has by and large delivered on our expectations and exceeded them," he added. A recent diplomatic success for the country was the signing of a peace accord on September 22 with Hezb-i-Islami, led by former premier Gulbuddin Hekmatyar.

The country has also made progress in areas of women's rights, anti-corruption measures and revenue collection.

EU officials denied that the pledges would have conditions attached, after the leak of an EU memo in March that suggested that financial pledges would be made in return for Afghanistan accepting 80,000 asylum-seekers deported from EU countries.